Problem In Combo dvd/cdrw - Help

sorry if I post in a wrong place but this my 1st.

I have SONY VAIO FXA47 notebook with combo MATSHITA UJDA720 dvd/cdrw I have a problem with this drive it can’t read most of copied cds’ I insert specially the movies but some times read software cds’ and old copied cds’. when I insert the cd it’s detected as blank cd. I have windows XP pro.

I use B’s Gold & Nero 6 but I can’t burn at all now

I removed nero & b’s gold and I update the ASAPI to 4.7 but I still have a problem

I removed the driver of the cd from the hardware device manager and re-install it and still with the same.

Can any one help