Please Help!.. LG GMA-4080N

Hi I have this drive in my Acer Travelmate 8104. I was wondering if anyone else has been able to read Princo A grade dvd-r’s with it? I had a whole stack of them burnt with my previous Acer Travelmate 8005 and now the 8104 won’t read them. It will however read ritek g05’s. It just thinks there is no disc in the drive…

also has anyone found a working rpc1 patch for this drive?..

thanks in advance