problem!!

hi guys, i have a gamecube with xeno gc and i used verbatim and imation mini dvd-r and both worked fine and then i didn't use my gc for a month but when i used it again the verbatim and original games are working fine but imation mini dvd-r's dont work and any new game i burn doesn't works either
i have absolutely no idea whats wrong...........any ideas?

 

Imation is not reliable media for backups, that may be your problem.

 

but it worked before..........

 

They wear out and stop working much sooner then higher quality discs.