AJAX :: TabContainer Sys.ArgumentUndefinedExcpetion - Value Cannot Be Undefined

I have seen posts discussing this error however, no post has identified a solution to address the issue I am having, so here it goes.

I am using Micosoft Visual Studio 2008

.NET Framework 3.5 SP1

AjaxControlTookkit 3.5.40412.0

Step 1: I create a new, ASP.NET Web Application.

Step 2: Add a 'New Item' from the templates called 'AJAX Web Form'.

Step 3: In Source view go to the Toolbox and drug a 'TabContainer' directly below the ScriptManager tag.

Step 4: Switch to Design view and click 'Add New Tab' on the TabContainer control.

Step 5: Switch back to Source view and add a ContentTemplate open and close tag within the TabPanel tags.

Step 6: Between the open and close ContenTemplate tages add something. I added the following 2 letters, Hi.

Step 7: Set the page we have been working on to your startup page and run it.

Step 8: You will get the following exception every time. Sys.ArgumentUndefinedException: Value cannot be undefined. Parameter name: type

I have tried about 15 different ways to create the most simple use of this control and it fails every time in IE7 and FireFox.

The code.

[Code]....