RadScriptManager visual studio 2010

[brian]

This all worked in visual studio 2008, I just upgraded to 2010, project is targeted to 4 framework, ajax toolkit 40412 and latest telerik toolkit RadControls for ASP.NET AJAX Q1 2010
In my first page I have this:
    <telerik:RadScriptManager ID="ScriptManager1" runat="server"
        EnableTheming="True">
    <AuthenticationService Path="~/Services/SpendusAuthService.asmx" />
       <Scripts>
          <asp:ScriptReference Path="~/js/logon.js"/>
       </Scripts>
       <Services>
          <asp:ServiceReference Path="~/EndPoints/RegistrationService.svc" />
       </Services>
    </telerik:RadScriptManager>
<telerik:RadWindowManager ID="RadWindowManager1" runat="server" Skin="Forest">
               </telerik:RadWindowManager>

and when I attempt to run I get this error :
Microsoft JScript runtime error: AjaxControlToolkit requires ASP.NET Ajax 4.0 scripts. Ensure the correct version of the scripts are referenced. If you are using an ASP.NET ScriptManager, switch to the ToolkitScriptManager in AjaxControlToolkit.dll.

If I switch the the toolkitscriptmanager I get telerik errors with radwindowmanager. what to do

[T. Tsonev]

Hello Brian,

This is a known issue with the RadScriptManager and the Ajax Control Toolkit that we've managed to solve only recently. Please refer to the following forum thread for details and for the possible solutions. The internal build mentioned in the blog post will be available for download later today.

I hope this helps.

Greetings,
Tsvetomir Tsonev
the Telerik team