I burnt the dvd on speed 2x (slowest), and the issue is related to the minird24.gz file, this fail contains the minird24 file which contains the information where the knoppix file is located and if I had changed it with a HEX editor before burning, I wouldn't have this issue now. It is not related to any software or hardware problems, Damn small linux just looks for the knoppix file in the wrong directory and I need to command him that he should look for it in a by me specified directory.