I have Knoppix 3.7 in my Hard Disk.

My computer allows me to boot from CD, before booting from HDD.

I am able to boot Live CDs like Mepis, Dyne:Bolic, Knoppix 3.6, etc. without any problem.

However, it is not allowing booting from CD when I try to boot a Linux distribution (www.vigyaancd.org) based on Knoppix 3.7. It simply ignores and boots only from HDD. My Hard Disk also has Knoppix 3.7

My question is : if Live CD and HDD both have the same "base", will it not boot from Live CD ? How can I overcome this ?