bought a liteon dh20a4p a while back, and for some reason when burning anything it wont go over a certain speed like when burning an xbox 360 game the max speed it will get up to is about 1.2x using image burn. and the device buffer fluctuates like crazy the whole time, tried updating the firmware and whatnot but didn't do anything, and i dont have any programs running in the backround, using verbatim media, any ideas on what could be causing this or how to fix it? any help would be appreciated thanks