Specified method is not supported.

Error :: "No Source Availaible"

i am using the visual studio 2010 with Asp.net c# i have done a project and facing a challenge in it

By showing the pop up window like

and if i click on the CONTINUE than it proceeds to running mode with this i am getting one more pop up like --

I have installed the System.web.dll for it but there is no effect on error by doing this the same thing happens

and by clicking the View Detail link in the first pop up i am getting these details in a window ---

i have searched a lot about it but not getting the solution to fix it.