How to fix this error say's "InnerException for exception details"? I'm using VS2010-ultimate, Silverlight 4 C#, windows XP sp3. Self hosted site iis v5.1. I tried to run the ready made solution provided by vs2010 then deploy it to the web using my own server (hosting) I, then was able to run the solution and able to login and out to the web. When i try to attach another project within the solution and made another database for that solution, and let the solution run to localhost then it was successful. So, I tried to deploy it to the web but error appear as above mentioned" Please help what to do.. Thanks!