windows live messager conflict with MicrosoftAjax.js

Question

I am  getting following error

Microsoft JScript runtime error: Sys.InvalidOperationException: Operation is not valid due to the current state of the object.

source file : MIcrosoftAjax.js

 

I have tried following thread but no success

http://blogs.msdn.com/b/messenger/archive/2010/06/24/resolving-a-conflict-with-asp-net-ajax-extensions.aspx