Is anybody successfully developing modules in DNN6 with the ajax toolkit? I've been working on a module in DNN 05.06.02, compiling my module and running the website in .net 4 without any issues. (ajax toolkit version 4.1.50401)
I have now replicated my development environment in a DNN 6 installation. The module compiles without errors but the ajax controls will not render. The script error I'm getting is:

'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' 

Any ideas?

Just to add a bit more detail. I'm adding the ajax page directive to my ascx files:

<%@ Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="ajax" %>

Then letting the core wrap the ascx file in an update panel by setting the 'allow partial rendering' in the module definition

Can somebody from the Core team comment? Is the AjaxToolkit now unsupported? I have read other threads from DNN5 installs where developers have replaced the 'ScriptManager' in the default.aspx page with the 'ToolkitScriptManager' but I want to avoid modifying the core application.