I just can't figure it out

[haxxorboi]

I have a version 4 or 5 PS2 and I was gonna modchip it myself so I opened it up and got it ready (was gonna get the chip on christmas, it's a magic v) and I got scared and I'm just gonna have someone else install it cause I have horrible luck with soldering for some reason....

anyhow I have a couple games (THUG and SSX3) and I was gonna play them, so I put the thing back together and for some reason it makes a clicking sound and then ejects fine, then I can play any audio CD, however DVDS and games I can't play for some reason

I'll leave the game in there and after about 5 minutes it says "disc read error" and it won't boot it obviously...

my memory is accessable, my controllers work, and the drive spins it just doesn't read the disc...

PLZ, I can't even send in the PS2 to get modded if it doesn't work (the place I wanna send to checks for things like that.)

Do you think I have to realign the laser or what, this is driving me insane, I wanna play it really bad, and I've checked so many things and can't figure out the problem, then someone told me it might be the laser alignment....

Any ideas? Thanks A LOT for any response