very confused

[disturbed]

i have a neo key and v1 PS2, i have gameshark v1.9 and have tried to copy PS2 format games using verbatim cdr's. midnight club and dave mirra pro bmx (and every ps1 game) are the only ones that work? every other PS2 games i've tried freezes my PS2 at the "insert game cd" screen of the GS2, when the tray closes and i hit the x button i hear the cd spinning for about 4-5 seconds then it stops. any idea what i might be doing wrong? i must have copied the games right because i have 2 games to work and i used the same settings on every game. i have also looked for any patches for the game b4 burning, most didn't need one. please help.
THANKS in advance