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.

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PS2 V7, DMS3 V2 (FW:2.4Beta7), SONY BBA, Seagate Baracuda 200GB-HDD, my AIO 0.5
PS2 V7, CC1.0 (FW:34 hacked v2 BM:2.1.6), SONY BBA, Maxtor DiamondMAX9 PLUS 160GB-HDD, My AIO 0.5, Sony-Linux, xRhino-Linux
2xSony MC 8MB
MAX 16MB/Datel 16MB with Boot-CD
MAX 32MB/Datel 32MB *I found it!*