Visual Studio 2010 TFS Build Error

I'm setting up VS 2010 Team Foundation Server for a personal project. It is overkill for a single developer but It is a learning experience for me. I'm having a problem with the build configuration. I set up a controller and agent with the default settings. However, when I run a build I get the following error:

The project file 'C:\Builds...{Solution}.sln' was not found.

I find t开发者_JAVA技巧hat the folder is created, but it is empty. Looking for a push in the right direction here. Thanks.

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Open the Build Definition and make sure that the Workspace tab is filled in correctly. something like $/FolderWithMySolutionFile -> $(SourceDir) and that it's set to Active, not Cloaked

See also: http://msdn.microsoft.com/en-us/library/hh190721.aspx