Problem backing up CD's

[The_GunBlade]

I'm trying to backup a game, just like I used to do about 2 years ago. My good old PS2 still reads the CD's I backed up back then, but for some reason, it can't read the CD's I'm trying to backup now! It makes this ticking noise then and then waits and asks me for a PS2 CD. I tried several burners, software (NERO, CLONECD, ALCOHOL 120%) and several CD types, but I am getting the same result. Maybe I'm getting forgetful in my old age and there's something I'm missing? Can you please help me out? Note again: The PS2 reads old CD's I backed up 2 years ago.