i believe that helping each other is a way to help him self, so i post my experience and hope that it will help other

i have a laptop thinkpad x20 to connect the cd or the floppy i use an ibm bay2000 using a pcmcia cable or usb one. i udated my bios the the new version. the bios detect the bay and by the way the cd drive or the floppy.
knoppix boot but i get a message telling that knoppix couldn't find the cd and by reading the forum they told me that knoppix couldn't boot using usb or pcmcia conncetion.
the only solution for that is to coppy the knoppix folder from the cd to the bootable partition in the hdd ( c: ) and then reboot the laptop with the knoppix cd in the cd drive, the cd will look and start knoppix from the partion were you copied the knoppix folder
if you couldn't boot from the cd using the usb cable, boot your windowz with the usb cable connected to the laptop and the bay and then shudown and reboot and everything will be ok
i hope i was enough clear and if someone need some help he is welcome

note : i tried to boot using the knoppix floppy but it failes, thats why i used the knoppix cd to boot