I can't imagine why it won't open!
I've check the issue which could be causing this and they are
- not having login control
- placing my project in directory with complicated symbols or sth like that and my project dir is clean "C:\Documents and Settings\Shak\My Documents\Visual Studio 2010\Projects\WebApplication1"
What else could it be!!
The problem seemed to be the white-space in the project name. After removing these, it all worked fine.