Simple Magic3 problem.....help

[jayzerus]

I have just installed a magic3 into my US version 7 ps2.
It will boot: psx backups, psx orig, ps2 orig, and ps2 backups that came from DVD format games that I ripped. I don't have any DVDr's to try, because I don't have a DVD writer. It will not boot any game that came from a blue back (CD format) game. I am pretty sure I got something wrong, but don't know where to start. Please help.