Easy CD Creator is known to have some trouble copying playstation CDs. It's a popular program but certainly not the best. For copying PSX CDs use a program that uses RAW data mode like CDRWIN or CloneCD. They can make exact replicates of PSX CDs(although you'll need a mod-chip to play them in a PSX) and most other CDs. Nero is another very good compiler program that can copy PSX CDs.