Help burning isos

[Alizom]

I'm kind of new to this console backup burning ... So I got DC since it's the easiest for that (and no modchips needed). Well, I burned the bootloader 1.1, it works only for original games but for backups it won't detect them. I tried to load games with auto-boot still nothing (with bootdisk and without). I went through 15 CDs today, burning them with Alcohol 120% (it was a clonecd game), then I burned a DiscJuggler iso with Alcohol 120%, nothing works. I downloaded DiscJuggler 4.1 Pro, burned with mode1/cd-da - nothing, mode1/cd-xa - nothing, mode2/cd-xa - nothing, mode2/cd-da - nothing.... My DC was made in October 1999, so it shouldnt have copy protection BIOS. I need help please