Reapy

Hi, I recently installed the GLSL shader mod for MC 1.64 and use it together with Sonic Ethers Shaders V08 Lite and the game isn't nearly playable. It is not very smooth and i don't get much fps. I have an AMD Phenom II X6 at 3,6 ghz and an AMD Radeon 7950 boost. So the hardware should be capable of using the mod. Can someone help me? I just want to have beautiful light in tekkit Daniel