Geforce 240 GT 1GB DDR3 not installing properly

Hello, I'm trying to install the 240 gt driver and I'm having problems with it. I keep getting an error "The graphics driver could not find a compatible graphics hardware." I had a cd driver disk that came with the card, but It doesnt seem to work correctly, it "installs" the drivers, but the fps is like 12 in wow which I know this card can do way better than that.
I have tried downloading different 240 drivers from nvidia.com get that same error. Also if I go into computer management and update display drivers it will update to "Standard vgs graphics adapter"
So I don't know what Iam doing wrong. I went from a 8600 gtx to this 240 gt for now, and the 8600 is out doing it, but I know that is because the 240 isnt installing correctly.
Any help will be helpful.
Im using a dell Dimension 9150
Ram: 4gb
OS: 32 bit win 7
Graphics card is a 240 gt ddr3

I do want to throw in that I tired the card on my EVGA P55 SLI motherboard to and same results.