Crashes doing generic, Ipod, moble

Hi, DVDFab works great when I use it as DVD to DVD. When I use it as DVD to Generic or Ipod or Moble it crashes, sometimes at 5% or 10% and so on. I am using the new version, it did the same with the version before also. The DMA is working. Out of the 20 times I tried to do this it worked once. Can anyone help me? I am using XP Home and Athlon 3.2g.