Graphics card driver problems

[UGA89]

I recently purchased WoW Cataclysm and the fps during game play isn't ideal. I soon thought of seeing if an update for my MBP's graphics card (NVIDIA GeForce 9400M) was available. Nvidia suggest to download CUDA as well for optimal results which worked. I soon found an updated driver for it and attempted to install but received error message "This computer will not support this NVIDIA graphics solution." What confuses me is I provided the correct specs of my card and OSX version. What can be done and will a driver update even improve my gaming performance. I do not know much about Macbooks or computers in general so I do not know what to do or even what to look for. Thanks

Specs of my comp:
late 2009 15' Macbook Pro 2.54 GHz Intel Core 2 Duo 4GB
graphics card:NVIDIA GeForce 9400M
if any other information needs to be provided I'll gladly post it.

 

[aimbdd]

Why? Because there is no driver updates you can download from any site. They all come directly from apple through software update. Old graphics. Not to much you can do. Integrated graphics were never great for games.