I'm trying to inslall a 64 mb mx 420 in a Dell 2350. I uninstalled the current driver, Installed the mx 420 card and then downloaded the driver and restarted. When i plug it in the new VGA it says frequency out of range on the monitor. I had to plug it back in to the old vga to use the monitor and then reinstall the driver to get color back. Why wont the 420 MX work?