Windows 7 - Visual Studio Express C# x64 Issues!!

Hi, I really dont know if i'll get any answers here, but im having serious problems using VC C# Express on windows 7 x64. I have an App that needs to be compiled as x86, which I have gotten it to do.
It has also worked before. But now for NO REASON it has stopped working on my Windows 7 install.

I have a computer with windows XP 32-bit i've used to help troubleshoot my problems, and I can get it to compile and run correctly on this XP install, but when i take that same, working exe, and copy it to windows 7, it throws me an error. Likewise, when I take the working project folder and copy it to my Windows 7 install, and try to compile it, it gives me an error!

Like i said, it was working fine before, with no changes made, its stopped working. Does VS really support 64 bit?? What also makes no sense is, I still have an exe which was compiled with Windows 7 x64, as an x86 file from the same unchanged source code I am using now, it runs just fine!

Again, I really dont expect anyone to have an answer as I've pretty much come to the conclusion that VS just plain hates x64 and is a buggy piece of crap when it tries to play nice with it.

... submitting took out any formatting i had sorry.