when i put in my knoppix cd and try to boot from it without any cheat codes on

i get an error about a panic and says the drive isn't mountable and then the computer just freezes and capslock, scroll lock lights flash and i have to turn it off by the button on my computer is there anyway to stop this like some possible way i have had it run fine before then this just happened

its a fat32 Hd with Windows Me on it

Any help to fixing this problem would be greate thanks.

Matt