On a computer that is running Microsoft Content Management Server (MCMS) 2002 Service Pack 2 (SP2), you try to use the source control feature in Microsoft Visual Studio 2005 Team Foundation Server to check in files. However, you receive the following error message:

[Microsoft Visual Studio]Unable to cast object of type 'Microsoft.ContentManagement.DeveloperTools.VisualStudio.Documents.TemplateExplorerDocument' to type 'Microsoft.VisualStudio.Shell.Interop.IVsHierarchy'.

This problem also occurs if the following conditions are true:
•An MCMS 2002 project is opened in Microsoft Visual Studio 2005.
•You perform a unit test in Visual Studio 2005.