Unable to open the project

Apr 27, 2010 at 7:14 PM

I downloaded the latest build 23236 and tried to open the solution file using Vs 2008 but I get following errors.

The project file d:\trunk\hostingwebparts\orbitone.provision.webparts.csproj cannot be opened. The project type is not supported by this installation.

VS 2008 is version 9.0.30729.1 SP

Microsoft .NET framework version 3.5 SP1.

Reason to open the project is to debug as I am getting error 'object reference not set to an instance of object' upon clicking on 'Create User' button with createuser.aspx.

Thanks in advance,