Well not much info to go on
you did not say which DVDFab product you are trying to use all we know is it is ver 5232
I am using 5232. I have been using DVDfab on XP for a long time. This is a new laptop that came with Vista and I upgraded it to Windows 7. I can run “Full Disc” from an ISO file I copied with “Clone” ( from othe computer) and have the destination be a network folder. However if I “Write Data” from the ISO or “Full Disc” from the folders created and target the DVD, it starts, hangs for a while, then reports it is writing. Soon after it will report that the write process failed.