Backups work sometimes but not all the time

[99zoomer99]

I have had this problem with playing my backed up PS2 games on numerous occasions.....

Ill back up a game then play it. Ill try playing the same game a little while later and either it doesnt recognize it as a PS2 game or the ps2 logo will come on and it will lock up after that.

Is it the cds im using, the program i use to back up my games or WHAT??

Please help