dropdown select index first time not firing

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C#

ASP.NET4

Hi All,

I have a problem I am unable to solve.

1) I am creating some dynamic controls in the OnInit() method of the page by calling the LoadControls() method.
2) Inside the LoadControls() method I am getting a list from a database of what type of controls to add to the page, and what thier values are.
3) I create either a RadioButtonList, CheckBoxList or DropDownList.
4) I have set AutoPostBack = true and attached the SelectedIndexChanged event handler and method.
5) The CheckBoxLists and RadioButtonLists retain their values after PostBack and fire the SelectedIndexChanged event, the DropDownList doesn't do either.
All 3 control types are being treated the same during creation, not sure what I'm missing?
PostBack is happening for the DropDownList, just no event is being fired.
Thanks,
my code is -

<asp:DropDownList ID="ddlsmslist" runat="server" EnableViewState="true"
        Width="600px" AutoPostBack="True"
            onselectedindexchanged="ddlsmslist_SelectedIndexChanged"  >
    </asp:DropDownList>

protected override void OnInit(EventArgs e)
    {

        //if (!IsPostBack)
        //{
        //if (ddlsmslist.SelectedIndex != 0)
        //{
        this.ddlsmslist.SelectedIndexChanged += new EventHandler(ddlsmslist_SelectedIndexChanged);

            cntrlCount = -1;
            base.OnInit(e);
            string[] temp = new string[10];
            indexing = new string[100];
            template = template.Replace("##Field##", "&");
            temp = template.Split('&');

            for (int i = 0; i < temp.Length; i++)
            {

                cntrlCount++;
                Label l = new Label();
                l.ID = "lbl" + cntrlCount;
                l.Style.Add("float", "left");
                l.Text = temp[i].ToString();
                templateFormPlaceholder.Controls.Add(l);
                indexing[cntrlCount] = "lbl";
                if (i < temp.Length - 1)
                {
                    cntrlCount++;
                    indexing[cntrlCount] = "txt";
                    TextBox t = new TextBox();
                    t.ID = "txtBox" + cntrlCount;

                    t.Style.Add("float", "left");
                    templateFormPlaceholder.Controls.Add(t);
                }

            }

            templateFormPlaceholder.Visible = true;
            submit.Visible = true;
            divcontant.Visible = true;
        //}

        //else
        //{
        //    templateFormPlaceholder.Visible = false;
        //    submit.Visible = false;
        //    divcontant.Visible = false;

        //}


}

protected void ddlsmslist_SelectedIndexChanged(object sender, EventArgs e)
{
    if (ddlsmslist.SelectedIndex != 0)
    {
        GetSmsTemplatebyid smstemplate = new GetSmsTemplatebyid();
        GEtSmsSettingsOutput smstemplateoutput = new GEtSmsSettingsOutput();
        InsertSmslogseInput smstemplateinput = new InsertSmslogseInput();
        smstemplateinput.Sms_Id = Convert.ToInt32(ddlsmslist.SelectedItem.Value);
        smstemplateoutput = smstemplate.Execute(smstemplateinput);
        template = smstemplateoutput.Sms_Template;

    }
    else
    {

    }


}

plz help me anyone.