How to bind arraylist from java class to flex combobox

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Java

Flex

Hi,
i'm new to this flex please help, i'm facing some issue i'll post those codes.
Actually i trying to pass a list from java class to combo box in flex.

ActionScript:
*********************************

package assets.actionScript
{
    import mx.collections.ArrayCollection;
    import mx.controls.List;

    [Bindable]
    [RemoteClass(alias="com.connectm.telecom.commandcenter.dto.CommandCenterConfigPaceDTO")]

    public class CommandCenterConfigPace
    {
        public var command_config_id:int;
        public var command_name:String;
        public var command:String;
        public var command_disc:String;
        public var flag:String;

    }
}

****************************************
Java Class
****************************************

public List<CommandCenterConfigPaceDTO> getCommandNames()
	{
		DAO dao = new Telecom_DAO();
		Session session = dao.getHibernateSession();
		List<CommandCenterConfigPaceDTO> commandCenterConfigList = new ArrayList<CommandCenterConfigPaceDTO>();
		try
		{
			List commandCenterList = session.createSQLQuery("select command_config_id,command_name,command,command_disc,flag from command_center_config_pace where flag = 1").list();
			for(Object object:commandCenterList)
			{
				Object data[] = (Object[]) object;
				CommandCenterConfigPaceDTO commandCenterConfigPaceDTO = new CommandCenterConfigPaceDTO();
				commandCenterConfigPaceDTO.setCommand_config_id((Integer) data[0]);
				commandCenterConfigPaceDTO.setCommand_name(data[1].toString());
				commandCenterConfigPaceDTO.setCommand(data[2].toString());
				commandCenterConfigPaceDTO.setCommand_disc(data[3].toString());
				commandCenterConfigPaceDTO.setFlag(data[4].toString());
				commandCenterConfigList.add(commandCenterConfigPaceDTO);
			}
			
		}catch (Exception e) {
			// TODO: handle exception
			logger.error("Exception in EscalationLiveService to calling getCommandNames..."
					+ e.getMessage());
		}
		
		finally
		{
			if (session != null && session.isOpen())
			{
				dao.closeHibernateSession();
			}
		}
		return commandCenterConfigList;
		
	}

************************************************************
flex file:
***********************************************************

<?xml version="1.0" encoding="utf-8"?>
<mx:Application  xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute"
    creationComplete="callRemoteObject()"
    xmlns:local="alarmSlide.*" horizontalAlign="center"
    verticalAlign="middle" borderColor="#222222"
    backgroundGradientAlphas="[1.0, 1.0]"
    backgroundGradientColors="[#011234, #000000]">

<mx:RemoteObject id="remoteObject" destination="liveStatus"
    result="resultHandler(event);"
    fault="faultHandler(event);"/>


<mx:Script>
    <![CDATA[
        import mx.controls.Spacer;
        import mx.containers.ControlBar;
        import mx.controls.RadioButton;
        import mx.controls.RadioButtonGroup;
        import mx.containers.VBox;
        import mx.events.CloseEvent;

        import mx.collections.HierarchicalData;
        import mx.collections.XMLListCollection;
        import mx.messaging.channels.AMFChannel;
        import mx.messaging.ChannelSet;
        import mx.controls.Alert;
        import mx.messaging.messages.RemotingMessage;
        import mx.rpc.events.FaultEvent;
        import mx.rpc.events.ResultEvent;
        import assets.actionScript.TowerStatus;

        import mx.collections.ArrayCollection;
        import mx.managers.PopUpManager;

        [Embed(source='assets/warring.gif')]
        private var confirmIcon:Class;

        [Bindable] private var charCount:int =0;
        [Bindable] public var folderList:XMLList;
        [Bindable] public var folderCollection:XMLListCollection;
        // BlazeDS variables
        [Bindable] public var channelUrl:String;
        [Bindable] private var commandNamesList:ArrayCollection = new ArrayCollection();

        // to store tower configuration
         public static var data:ArrayCollection = new ArrayCollection();

         public var userID:int = 0;
         public var locID:int = 0;
         public var towerId:int = 0;
         public var isTowerLevel:Boolean = false;
         public var ipAddress:String ;
         public var isTowerLevelBeforeLevel:Boolean = false;
         public var dotaMessage:String="";
        //***************************************************************************************************************************************//
            /**
            * This method will be called as soon as SWF loads in the browser , creating a AMF channel which communicates to Java
            **/
            private function callRemoteObject():void{
                 cursorManager.setBusyCursor();


                userID = Application.application.parameters.userId;
                locID = Application.application.parameters.locID;
                ipAddress = Application.application.parameters.IP;
                towerId = Number(Application.application.parameters.towerId);

                var isTowerLevelStr:String = Application.application.parameters.isTowerLevel.toString();
                var isTowerLevelBeforeLevelStr:String = Application.application.parameters.isTowerLevelBeforeLevel.toString();
                isTowerLevel = (isTowerLevelStr == "true") ? true : false;
                isTowerLevelBeforeLevel = (isTowerLevelBeforeLevelStr == "true") ? true : false;
                channelUrl = "./messagebroker/amf";
                var cs:ChannelSet = new ChannelSet();
                var customChannel:AMFChannel = new AMFChannel("my-amf",channelUrl);
                cs.addChannel(customChannel);
                remoteObject.channelSet = cs;

                remoteObject.getDOTATowerXMLData(locID,isTowerLevel,towerId);
            }
//***************************************************************************************************************************************//

        /**
         * This mehtod helps into save all the configured towers
         **/
        private var towerIDColl:ArrayCollection;
        private var noofTower:Number=0;

        private function sendSMSToTower():void{
            noofTower = CommandCenterConfigPace.data.length;
            Alert.show("this." + noofTower);
            if(commandToBeSend.text==null || commandToBeSend.text !=""){
                if(noofTower > 0){
                    var alert:Alert = Alert.show("You have selected "+ noofTower+" Tower(s).\nYour message will send to each tower one by one.\nContinue?" ,
                     "Confirmation", Alert.YES|Alert.NO, this, confirmHandler, confirmIcon, Alert.NO);
                    alert.setStyle("backgroundColor", 0xffffff);
                    alert.setStyle("backgroundAlpha", 0.50);
                    alert.setStyle("borderColor", 0xffffff);
                    alert.setStyle("borderAlpha", 0.75);
                    alert.setStyle("color", 0x000000); // text color
                }else{
                    Alert.show("Please select the tower.");
                }
            }else{
                Alert.show("Message should not be empty.");
            }
        }

        private function confirmHandler(event:CloseEvent):void{
            if (event.detail == Alert.YES) {
                towerIDColl = new ArrayCollection();
                var towerStatus:TowerStatus = new TowerStatus();
                for(var i:uint=0; i<CommandCenterConfigPace.data.length; i++){
                    towerStatus = new TowerStatus();
                    towerStatus.towerId = int(CommandCenterConfigPace.data.getItemAt(i));
                    //Alert.show("tower is ::::::"+towerStatus.towerId);
                    towerIDColl.addItem(towerStatus);
                }
                //Alert.show(commandToBeSend.text+" message will send it to "+noofTower +" tower(s),it's doing backend.");
                remoteObject.sendDOTAMessageToTower(towerIDColl,commandToBeSend.text,userID,ipAddress);
            }else if(event.detail == Alert.NO ){

            }
        }

         private function callCount():void{
            charCount =commandToBeSend.text.length
            charCount++;
        }

        private function resultHandler(event:ResultEvent):void{
            var message:RemotingMessage = event.token.message as RemotingMessage;
            switch(message.operation)
            {
                case "getDOTATowerXMLData":
                    var xmlStr:String = event.result as String;
                    folderList = new XMLList(xmlStr);
                    folderCollection = new XMLListCollection(folderList);
                    //checkADG.dataProvider = new HierarchicalData(folderCollection);
                    checkADG.dataProvider = new HierarchicalData(folderCollection);
                    if(isTowerLevelBeforeLevel){
                        checkADG.validateNow();
                    }
                    checkADG.expandAll();
                    break;

                case "getCommandNames":
                    commandNamesList = new ArrayCollection();
                    commandNamesList = event.result as ArrayCollection
                    break;

                case "sendDOTAMessageToTower":
                     //    Alert.show("Send");
                      break;
                default:
                        Alert.show("Not able to read operation from Java program : " + message.operation);
                        break;
            }
            cursorManager.removeBusyCursor();
        }

        private function faultHandler(event:FaultEvent):void{
            var message:RemotingMessage = event.token.message as RemotingMessage;
            Alert.show("Please check your internet connectivity.");
        }

    ]]>

</mx:Script>

<mx:Style source="/assets/style/Tabular.css"/>

<mx:Panel width="100%" height="100%" title="Send SMS To Tower" color="#FFFFFF" id="mainPanel" layout="absolute">
    <mx:VBox width="100%" height="100%" backgroundColor="#E1E8F7">
        <mx:HBox width="100%" height="25">
            <mx:Label text="    Command Name" fontWeight="bold" fontSize="10" width="150" color="#080707"/>
            <mx:ComboBox id="commandNamesId" cornerRadius="0" width="376" fontSize="10" selectedIndex="1" dataProvider="{commandNamesList}" color="#0B0A0A"/>
        </mx:HBox>

        <mx:HBox width="100%" height="75">
            <mx:Label text="    Discription " fontWeight="bold" fontSize="10" width="150" color="#080707"/>
            <mx:TextInput width="376" id="discrip" editable="false" height="73" color="#0B0A0A"/>
        </mx:HBox>

        <mx:HBox width="100%" height="25">
            <mx:Label text="    Command " fontWeight="bold" fontSize="10" width="150" color="#080707"/>
            <mx:TextInput id="commandToBeSend" width="377" height="25" color="#0B0A0A"/>
        </mx:HBox>

        <mx:HBox width="100%" height="25">
            <mx:Spacer width="300" height="10"/>
            <mx:Button x="500" toolTip="Send Message" label="Submit" height="25" width="75" click="sendSMSToTower()" color="#080707"/>
        </mx:HBox>

        <mx:HBox width="100%" height="100%">
            <mx:AdvancedDataGrid id="checkADG" groupItemRenderer="assets.actionScript.DotaADGRenderer"
                                 width="100%" height="100%" color="#000000"
                                 horizontalScrollPolicy="on"
                                 resizableColumns="true" x="0" y="26">
                <mx:columns>
                    <mx:AdvancedDataGridColumn headerText="Tower Hierarchy" dataField="@label" showDataTips="true" width="500"/>
                    <mx:AdvancedDataGridColumn headerText="SIM Number" dataField="@simNumber" showDataTips="true"  width="300"/>
                </mx:columns>
            </mx:AdvancedDataGrid>
        </mx:HBox>
    </mx:VBox>
</mx:Panel>

</mx:Application>

*************************************************************************
Please help me where i'm wrong. and changes should i do... please please help...