Dvdfab express!

i been using dvd fab express for a little while now. When burning different movies
just after it starts the burning state, it tells me “fails when writing dvd:5”. I am currently using version 2.70, i have also upgraded to 29.69version and 29.71. I get the same results… i burned wedding crashers just fine with no probs. with american pie;band camp and fantastic Four, it failed… does any one have any suggestions? thanks