ASP.net VS IDE problem

Have a simple ASP.net website that was working fine last time I tried to open it in the VS2008 IDE.? For some reason, it won't open now.? No error message... just doesn't open.? Apparently, a .sln file or something like it is missing/corrupted.? Other projects open up fine in the IDE, so this is probably a simple problem to fix, but I am in a hurry to work on the project, not work on getting it to open again. So, I need help finding out why it won't open any more, and fixing the problem.