Not able to open the VS.Net solution

Mar 6, 2008 at 3:36 AM
I encountered the following error while trying to open downloaded solution with VS2005:

The project file 'D:\DP.Sharepoint.Workflow - DEV\DP.Sharepoint.Workflow.csproj' cannot be opened.

The project type is not supported by this installation.

Any suggestions on what i might be missing?