Got a "The project type is not supported by this installation" when converting MVC2 application to VS2010

I just installed Visual Studio 2010 Beta 2 on my hard drive. I also reinstalled MVC Beta 2.

I opened then my solution in VS2010 and I got the error message "The project type is not supported by this installation". I don't really understand since, first I upgraded from MVC1 to MVC2 in Visual Studio 2008 and today I tried to convert it to 20开发者_如何学编程10.

Any idea where would be the problem ?

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VS2010 ships with ASP.NET MVC 2 Preview 2. ASP.NET MVC 2 Beta is not supported on VS2010.