first off, what game are you trying to burn? (Can't remember if you've mentioned it)

second what games have you previously burnt with dj?

i ask these because i was able to burn ufc and sega gt, but then when i tried silent scope i got the buffer under-run message, so after lots of reading its to do with some burners not supporting multi-session games, so you have to use cdi2nero

you can read about it on my site, its:-

http://www.geocities.com/pauldavies76

hope this helps