Could not load file or assembly 'vjscor, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' or one of its dependencies. The system cannot find the file specified

Hi,

I am getting above error when i run my asp .net web application. I am using ajax tool kit control version 1.0. 

Some strange thing with this exception is when i run for the first time it is giving this error but after i refresh the page then it start working.

Can anybody tell me why it is happening so.

Thanks..