heya all, i recently bought a driving force ex, when i try it on lfs the accelerator and brake pedals wont work, they work on other games no problem but not lfs, can anyone help me?

Install the latest Logitech Gaming Software and make sure you set the pedals so they arn't combined in the software. Then in LFS, assign the axis's to the right pedals (gas, brake etc.) and callibrate them.