The project type is not supported by this installation.

Feb 2, 2009 at 8:18 AM
When I opened the source in Visual Studio 2005, I am getting this error

The project file '...CustomFieldTypes.csproj' cannot be opened.
The project type is not supported by this installation.
Coordinator
Feb 9, 2009 at 7:27 AM
Make sure you have Windows SharePoint Services 3.0 Tools: Visual Studio 2005 Extensions, Version 1.1  installed.