Access denied on this._xmlHttpRequest.open(verb, this._webRequest.getResolvedUrl(), true ); using WCF Service

[Mahdi]

Hi
I'm using RadComboBox but it alert "access denied" error.
I debug it and the error is on "this._xmlHttpRequest.open(verb, this._webRequest.getResolvedUrl(), true );" function in script resource.
My website is on localhost:12 and the WCF Service is on localhost:11.
And I haven't  any iframe on the page.
And this is page's code:

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Test.aspx.cs" Inherits="Test"
    MasterPageFile="~/UI/Masters/Content.master" %>
<%@ Register TagPrefix="telerik" Assembly="Telerik.Web.UI" Namespace="Telerik.Web.UI" %>
<asp:Content ID="Content1" ContentPlaceHolderID="cphMain" runat="Server">
    <telerik:RadComboBox runat="server" ID="RadComboBox1" Height="100px"
            EnableLoadOnDemand="true" ShowMoreResultsBox="true" EnableVirtualScrolling="true"
            EmptyMessage="Type here ..." dir="rtl">
            <WebServiceSettings Path="http://localhost:11/Items/ClientSidePersonManager.svc" Method="GetAllPrsForRadCombo" />
        </telerik:RadComboBox>
</asp:Content>

And this is web.config configurations:

  <system.serviceModel>
    <behaviors>
      <serviceBehaviors>
        <behavior name="WcfService.Items.ClientSidePersonManagerBehavior">
          <serviceMetadata httpGetEnabled="true" />
          <serviceThrottling maxConcurrentCalls="200" maxConcurrentSessions="100"
              maxConcurrentInstances="100" />
        </behavior>
      </serviceBehaviors>
      <endpointBehaviors>
        <behavior name="MyTestServiceBehavior">
          <enableWebScript />
        </behavior>
      </endpointBehaviors>
    </behaviors>
    <services>
      <service behaviorConfiguration="WcfService.Items.ClientSidePersonManagerBehavior"
        name="WcfService.Items.ClientSidePersonManager">
        <endpoint address="" binding="webHttpBinding" contract="WcfService.Items.IClientSidePersonManager"
                  behaviorConfiguration="MyTestServiceBehavior">
          <identity>
            <dns value="localhost" />
          </identity>
        </endpoint>
        <endpoint address="mex" binding="mexHttpBinding" contract="IMetadataExchange" />
      </service>
    </services>
  </system.serviceModel>

Thanks in advance.

[Mahdi]

No Answer Yet?

[Mojtaba]

I have same problem. any idea?

[Vesko]

I think when the applications are on different ports they are treated as on different domains hence the security error.

Try on the same port as the application is.

[Mahdi]

Thank you for reply
I read somewhere that this problem solved in Microsoft Ajax 3.5.
doesn't it?