Screwed x2?

[hockeydad]

I have an external plugmod and a Boot disc ver.2. I can burn copies of PSX games using CDRWIN, CloneCD, etc. all which work perfectly on my PS2 (same is true for CD-ROM PS2 games also) which also has an external USB Mod with Gameshark 2, so I know my copies are good. Problem is can't boot these copies in my PSX using either the plugmod (game enhancer- from plugmod.com) or the boot disc (from Gamegizmo.com). Are these products crap or am I not doing something. All PSX copies have been 1:1 copies- no patches, etc.