DiscJuggler error..please help

when burning games such as silent scope, 18 wheeler, quake, gta2, and many more my freind is getting an error that says " under run is or is not empty".....i was wondering if there was a way to convert this file since cdirip3 nor 4, and cdifix dont work....was also wondering if this is just something wrong with his cdr he has a hewlett packard cd writer plus 8100i....is there a patch out there to help his cdr copy small audio files (300 sectors or less)???