sometimes the disc is fucked up, return it and get antoher copy and see if that works. or maybe your PS2 has some dust on the lens. does this happen with other games?
you can clean the lens three ways. Get really close and blow into the CD drive, get some compressed air and put a lil in there (but this could move the lens and mess it up more) or the LAST thing you wouold want to do is crack open your Ps2 and clean the lens that way. but you if crack it open it will decrease the resale value and you wont beable to find anywhere to fix it. or if None of these work take it to some shop.
I bought a new game, 50 cent bulletproof i took it home took out the disc and put it in my ps2.IT does nothing i go on Browers and it has only got the memory card icon an no disc icon please!!! please!!! Tell me what i have to do thankyou