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ASP.NET 4.0 FormsAuthentication Transition (HTTP Error 400 - Bad Request.)

Posted By:      Posted Date: September 15, 2010    Points: 0   Category :ASP.Net
Hi everyone, I have been developing a webapp with vs2008 with .net 3.5 and yesterday moved to vs2010 and .net 4.0. I moved the solution folder to my new computer with vs2010 and it began the process of converting it for .net 4. After this everything appears to work fine but now when i use the login page i get a HTTP Error 400 - Bad Request when redirected to the client area page when i succesfully login, i dont know why this is happening. If I have take out the %2f from the url and replaced it with / the pages loads fine? why has this suddenly stopped working? Any ideas as to why has sudddenly started happening?!

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