Running games after patching with FMCB

I used the memory card adapter method to get FMCB on my memory card, and then proceeded to burn an .iso of my Persona disc that I made to a DVD-RW to see if I could actually play it. I plugged it in the ps2 (slimline, 79001 model thingie) and attempted to boot the disc, but it couldn't be read. I only patched the game with ESR Disc Patcher (GUI v0.24a) before burning it to the DVD-RW with ImgBurn. Am i doing something wrong? Is DVD-RW not a compatible disc to use with the PS2? Any help would be appreciated, and if this is all in a guide or something somewhere, please, feel free to point me in that direction and lock the topic if you wish.

Thanks,
Bandsnaw

EDIT: I've found out my dvd drive will only burn a DVD-RW at 2x speed. Does that affect anything at all?

There is not much chance a burned DVD-RW backup will work on your PS2, some games do but most games don't.
plus DVD-RW discs can strain the laser in the PS2 (because Rewritable discs are different from "normal" discs)

Best to stick with DVD-R