Unable to play PX and PX2 Backups. Need Help

[vlchang]

I'm having difficultly playing my Playstaion 1 and 2 backups. Any advice will be appreciated. I'm using Nero and Clone CD. I was able to burn it successfully but NOT able to play them all. What I meant is that I can play the first CD-R that I've burned but not the second or third. In addition, the CD-Rs that I've burned from the games (I've purchased from BLOCKBUSTER) does not seems the be working. Are they protected somehow? My bunners are IOMEGA ZIPCD 650 USB I1.1 and POINEER DVD-RW DVP-103.55