thank you Gozar for your reply
it is right that hda 1 was unpluged during the installation of knoppix(3.3) and thank u again for telling such an easy solution(yet to work on them) but i have two more problems
1. After many & i was able to install knoppix on it with lilo but after bios data check each time i got a message :-
you passed an undefined mode no press [return] to see available mode
press space to continue or wait 30 secs. i am using a samsung 17" syncmaster 753s.
2.further more my linux partitionn remains read-only even after mount command when i login as user and is read-write as root after using mount command(also with sudo when as user).

can you help in this or anyone else will help a newbie