what do u guys think i should do v4 problems

[datsun1200]

v4 magic 3.2 form modchip.ca (so called 3.2 from them) and a new lazer in it. First the ps2 & mod was working good all games was working and about 2 weeks later the damm games only work sometimes now only in about 3 out of 15 backup dvd games work. I use a cd cleaner (sometimes that thing skips or doesnt work ). Dvd-r that i am use is tdk 2x (they work good on my v7 magic v) and verbatim. Do u think i should adjust the lazer or fist try more diffrent dvd-r or ????????????.