Once worked, now doesn't

[phatjo424@yahoo.com]

Hey everyone,
Trying to figure out why a few games are no longer playing on my gc. Every single one i load will go to title screen, than throw up error code and telling me to restart my console. Not sure if there is a settings page to have a better chance of games to play but would love some help so I can better understand. I have swiss v0.6 sd2sp2