hope anybody could help..

i made a project and want to burn a DVD.
but everytime it's failed while rendering around 30%.
everything seems fine, so i have absolutely no idea about that.

on the manual, if i put long complex subtitles which causes.
..i haven't put any subtitles.
there r 2 sub menus on a top menu, each sub menu has 3 movies.

4.3Gb for total amount of movies which wouldn't be a problem i think...
could i have any gd solution?