I can not open rpt file with VS 2010

because when I try to open an rpt file from the Solution Explorer, not open in VS 2010 but with the file editor of the Crystal Report, the 2008 version 开发者_JAVA百科let me, any idea why this happens? thanks

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Note the same stuff here: Crystal Reports Problem with .net 4

You may need to add to your application's config file.