MS Charts Conflicts with ASP.NET Ajax Toolkit

Question

My asp.net web application runs fine until i hit a page that has an MS Chart. When i do i get this runtime error message:

Sys.ArgumentTypeException: Object of type 'Sys._Application' cannot be converted to type 'Sys._Application'. Parameter name: instance

My application uses the ASP.NET Ajax Toolkit for various things. The error message would suggest that two different Sys._Application objects are being created, possibly using two different release versions.

Is this a known problem, and if so how can i splice the 2 versions together?