I'm not seeing anything you're doing different from telerik's example: http://blogs.telerik.com/blogs/posts...lverlight.aspx

I cringe that they're suggesting to use HtmlPage.Window.Eval rather than HtmlPage.Window.Invoke.

http://pietschsoft.com/post/2008/06/...op-Basics.aspx

http://msdn.microsoft.com/en-us/libr...(v=vs.95).aspx