Visual Studio + Crystal Reports + SourceSafe =自动结帐

I have a simple VS2008 project with several crystal reports, created with Crystal Reports 2008 (outside Visual Studio). The solution is added to source control (Visual SourceSafe 6.0). Now every time I open the solution all the reports are checked out together with their corresponding cs files. No changes are made to the files, so I can just undo the checkouts, but that's very annoying. Has someone encountered that problem and is there a solution?I have a simple VS2008 project with several cry