Ps2 backups won't run

[ludrant]

I have a magic v mod chip. In a ver 7 ps2, it will run backup ps1 games, backup dvd,s and original ps1/ ps2 /dvd Disks. I cannot run any ps2 cd-r or DVD+R Backups. It appears to load the game but freezes just before the PS2 logo. DVD was backed up with record now max and cd-r was backed up with clone cd. Any suggestions as to why I can’t get the ps2 backups to play?