I have Knoppix 3.7 and I had this problem. I found that the 2.6 kerrnel detected the network adaptor and the 2.4 did not. On the boot screen type " knoppix26 " without the quotes. And then press return(enter) key. This may take a moment to load. Mine takes on average of 5 min. Using this may help get you connected. It worked for me.