ok so ive waited 1.5 hours while adobe premiere "burns" my 4min video on a cd or dvd. pop up shows that the task is complete and my dvd player ejects. yet when i open the same cd/ dvd on my computer it says that the disc is empty.

the only way that ive been able to save on a disc though is when i first burn the movie on premiere as ISO and then thru nero burn that ISO onto a disc. what am i missing here? why cant i directly burn my movie from premiere to a disc?