I've presently installed a newest Pioneer DVR-A18L unit in my Apple PowerMac G5 Dual 2 GHz desktop on which I have installed Mac OS x 10.5.7. I think I made a mistake after installing the new pioneer unit. When I rebooted my system and as soon as I launched Toast (v9), and checked first DVD burn then it showed me Kernel panic screen while burning. YOU NEED TO RESTART YOUR MAC! I have tried the same thing many times but got the same result every time. What could be the problem here?