hi, thanks once more for ur quick reply.
i had a bought a new hdd few days back so i have not installed any writing software except nero and eac.
and as for the os its winxp(sp1 2600).
i checked the aspi layer , and found it was not properly installed.
so i followed ur lead and installed it properly.
i will give u my feedback wthin a few hrs.
i think u were right , the prob. must be with the aspi layer.
man! u r brilliant and fast!
i wanted to ask u which would be the ideal firmware for me QS0B or QS0C.
once again thanks for the fast replies:bow: