VS.NET resource problem

Hello everyone. I have a strange problem with Visual Studio .NET and can''t solve it already for several days. Me and another programmer are working on the same MFC project, it''s the scene editor for our game. Few days ago I reformatted my HD and reinstalled my Windows 2000 and .NET. Now when I''m trying to open the project last saved buy the another programmer [who''s running the Win2K and VS.NET installed from the same distributive], I am having a problem about the resource script the project has. When trying to browse its resources in the Resource Viewer of the IDE, I get a message box reading: A resource in this file uses an unknown language: Unknown language: 0x2B, 0x1. Unable to open this file. I have tried to overwrite the resource file with another one which was last saved on my computer, but I get the same error message. Please assist, I''m confused..