Hi Sebastian,

I have DNN install version 5.1.4 and modules with Ajax v3.5.  When I run the site, there's a script error "Message: 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".  When you said DNN comes with Ajax 1.0 and DNN 5.2 will contain Ajax 3.5, does this mean with my DNN 5.1.4, I have to get Ajax v1.0 and reference in my modules for it to not raise the script error?

Thanks.

Hi Sebastian, thanks for you response.  I'm sorry I was wrong about my current DNN version.  It's actually already 05.04.01 (26).  In the host settings, I see that it's .NET framework 4.0.  In my ajax enabled user control, I have code on page_load like this
try
{
    if (DotNetNuke.Framework.AJAX.IsInstalled())
    {
        DotNetNuke.Framework.AJAX.RegisterScriptManager();
    }
}
catch (Exception ex)
{
    Exceptions.ProcessModuleLoadException(this, ex);
}

The page loads with script error "Message: 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." in the /DNN/ScriptResource.axd file.  I'm using controls from Ajax Control Toolkit binary version 3.5.  I read on the web that someone fixes it by replacing the traditional <asp:ScriptManager> tag with <asp:ToolkitScriptManager> tag.
But... since I'm hosting my module in DNN, I can't declare this statement in my ascx b/c DNN is automatically injecting the script manager already.  Am I getting the script error because DNN is injecting the traditional script manager  instead of the new <asp:ToolkitScriptManager> tag required by toolkit v3.5? 

The page ajax functionality actually works but I don't like the script error.  How do I fix this?
Thanks.