I have installed Knoppix 7.4 on 6 out of 7 computers in my office and they all are working fine.Now, in the 7th computer, version 6.2 Knoppix works well but when I try the latest 7.4 version, the DVD boots till the wallpaper screen and then gives me a blank screen.I tried many cheat codes but still was not able to avoid the blank screenThe Graphic card details are :Advanced Micro Devices (AMD) Nee ATI Rage XLHow can I resolve this problem?