Using NDoc in Visual Studio 2005

[Kuldeep]

Framework: Visual Studio 2005
Technology: ASP.NET 2.0
Language: C#.NET 2.0

Hi All,

I followed the instructions as given in
http://geekswithblogs.net/sudheersblog/archive/2006/07/24/86146.aspx

After doing that, once i select a .sln file from my NDoc, it throws this
error.

"There are no projects in this solution that NDoc can import.
Either the solution is blank, or the projects contained within
the solution are not of a type NDoc can import."

Is there a way to deal with this?
Please help.

Kuldeep