This has nothing to do with your chip, but with your laser.
+RW maybe is the worst media, you can get for your PS2, while Verbatim itself is good.
Try Verbatim DVD-R.
If it still doesn't work, post your Burning-Speed, Media Certification-Speed, DVD-Writer Manufacturer and model,...
That all will help us,l to help you.
PS2 V7/DMS3 V2 (FW:2.4b7); Seagate Baracuda 200GB
PS2 V7/CC1.0 (FW:34 hacked v2 BM:2.1.6); Maxtor DiamondMAX9 PLUS 160GB
PS2 SCPH-30004R; NoMod+NoLaser
3xSony MC 8MB
MAX/Datel 16MB with Boot-CD
Custom FMCB 1.8b+ Beta-Build, my AIO 0.5, Sony&xRhino-Linux