CDRW problems

I’ve been having alot of trouble burning cds recently. No programs seem to be able to burn any kind of cd type. I’ve wasted 5 cdr’s trying various programs (Nero, Burn4Free, AC 120%, iTunes). The only sucess I’ve had is with Burn4Free, which i managed to get to burn the 3 Mandrake 10 isos I was wanting to get on cd.
I’m using Win XP Pro and my CDRW is a Liteon LTR-52327S.