Nvidia Quadro graphics card

Lately,
I've had a really bad time with my machines. First, my main workstation processor went out. Then, the video card on my laptop also went south. Here's the question. I have replaced the video card with a Quadro 2500 FX. The problem is, I can't get the resolution settings to go any higher than 1280x1024. The weird thing is, it did kick in after I first installed the drivers, but then, after rebooting later this afternoon, it went back to the 1280 setting. Now, I can't get anything bigger than that. I also noticed that I don't have that Nvidia icon on the taskbar on the lower right. What drivers can I use to get back to normal? thanks