Problem!

[sm83]

When i make copies of my psx games some work and some don't. for the games that don't work, after the sony start up screen, the screen jus stays black. i have a mod chip and i am using clonecd. i always burn on the default settings. does anyone know what the problem is or why does only some of my games work and the rest don't. Also the games i have do not need to be patched. ur help would be appreciated.