showing error message while add wcf service with wsHttpBinding

using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.Serialization;
using System.ServiceModel;
using System.ServiceModel.Web;
using System.Text;
using System.Data;
using System.Data.SqlClient;

namespace samplewcf
{
    // NOTE: You can use the "Rename" command on the "Refactor" menu to change the interface name "IService1" in both code and config file together.
    [ServiceContract]
    public interface IService1
    {
        [OperationContract]
        List<result> personaldata(string userid);
        //[OperationContract]
        //void add(result1 s);
        [OperationContract]
        DataSet gridbind();

        [OperationContract]
        bool fun();

        // TODO: Add your service operations here
    }


    // Use a data contract as illustrated in the sample below to add composite types to service operations.
    [DataContract]
    public class result
    {
        [DataMember]
        public int Nofid
        {
            get;
            set;
        }
        [DataMember]
        public string Name
        {
            get;
            set;
        }
        [DataMember]
        public bool Gender
        {
            get;
            set;
        }
        [DataMember]
        public char Status
        {
            get;
            set;
        }
    }
    
   
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.Serialization;
using System.ServiceModel;
using System.ServiceModel.Web;
using System.Text;
using System.Data;
using System.Data.SqlClient;
using System.Configuration;

namespace samplewcf
{
    // NOTE: You can use the "Rename" command on the "Refactor" menu to change the class name "Service1" in code, svc and config file together.
    public class Service1 : IService1
    {
        List<result> res = new List<result>();
        public List<result> personaldata(string userid)
        {

           //am using some data source.. for this data but.. its ok with values 1,person,true,A

            result rs = new result();
            rs.Nofid = 1;
            rs.Name = "person";
            rs.Gender = true;
            rs.Status = 'A';
            res.Add(rs);
            //rls.Add(rs);
            return res;        

        }
        public DataSet gridbind()
        {          //here am using some data source..  u can user any data that store in dataset
            DataSet ds = new DataSet();
            return ds;          

        }
        public bool fun()
        {
            return true;
        }
    }
}

<?xml version="1.0"?>
<configuration>

  <system.web>
    <compilation debug="true" targetFramework="4.0" />
  </system.web>
  <system.serviceModel>
    <services>
      <service name="samplewcf.Service1"
        behaviorConfiguration="samplewcf.Service1Behavior">

        <!-- Service Endpoints -->
        <endpoint address="ServiceFile.svc" binding="wsHttpBinding" contract="samplewcf.IService1">
        </endpoint>
        <endpoint address="Service1.svc" binding="wsHttpBinding"   contract="samplewcf.IService1"/>


        <endpoint address="mex" binding="mexHttspBinding" contract="IMetadataExchange"/>
      </service>
    </services>
    <behaviors>
      <serviceBehaviors>
        <behavior>
          <!-- To avoid disclosing metadata information, set the value below to false and remove the metadata endpoint above before deployment -->
          <serviceMetadata httpsGetEnabled="True" httpGetEnabled="true"/>
          <!-- To receive exception details in faults for debugging purposes, set the value below to true.  Set to false before deployment to avoid disclosing exception information -->
          <serviceDebug includeExceptionDetailInFaults="false"/>
        </behavior>
        
      </serviceBehaviors>
    </behaviors>
    <bindings>
      <wsHttpBinding>
        <binding name="TransportSecurity">
          <security mode="Transport">
            <transport clientCredentialType="None"></transport>
          </security>
        </binding>
      </wsHttpBinding>
    </bindings>
    <serviceHostingEnvironment multipleSiteBindingsEnabled="true" />
  </system.serviceModel>
 <system.webServer>
    <modules runAllManagedModulesForAllRequests="true"/>
  </system.webServer>
  
</configuration>