Dual Boot XP and Knoppix problem

I have got xp and Knoppix on the same harddrive with different partitions. I want to use the NTLDR to select between os's, and I have modified the boot.ini so one of the selections is for knoppix and the other is for XP.

In Knoppix I have used the dd comand to create a linux boot file. dd if=/dev/hda3 bs=512 count=1 of=/mnt/floppy/knoppix.bin

I copied that file to the root of the c drive, but when i select knoppix i get the screen is just black and will not boot Knoppix!
When i press a key the screen is black.

I think i need to create a new knoppix.bin file because i did not edit anything i just used the dd command and i dont think the linux boot file is poinmting to hda3.

Any ideas!!


Thanks

Jacko