Guitar hero world tour will not work on my playstation2

Same issue. My disc will load on a neighbor's PS2, which looked older than our model SCPH-77001, but I only get "Disc could not be read" on our machine.

I just got off the phone with the Sony PS2 support folks. They say that this game has "dual layers" on the disc which require the player to perform 100% up to factory specs. For $45 I can send it in and get it exchanged for another player that is up to spec. My inner skeptic tells me that I will have this same problem in a month or two when the exchanged player slips from being completely up to factory specs.

What am I going to do? I have three future rock stars who are whining and crying because the primo Christmas present is not usable, except for the fact that they can pound the drumsticks on the drum controller. Sony wins this round....