Hello, I seem to be having a slight issue with mining litecoin on Windows XP. I've gone through just about every version of cgminer and even a couple versions of sgminer and all of them come up with the same error message, "opencl.dll was not found". The program is thus unable to start. I'm not sure why it's saying it needs that file because I can start it on other computers just fine. I'm new to litecoin mining, can anyone help me?