will it support Windows 7? Why does only one memory slot work when using (2) 2gb stick of memroy?
Yes, it supports Windows 7, I've run Win7 on it before.
If you're having problems with the memory, it's either bad memory or a bad memory slot on the board. I'm running it with two 2 GB sticks and two 1 GB sticks at home, and it does just fine.