Dvdfab Platinum 3 problems

im trying to back up my dvds onto a external drive but i am having problems. i converted it to avi dvix format and the picture is perfect but the sound is out by 3-5 seconds any one know how to solve this as i’ve looked through the guides but they are all for new software

You should upgrade to the current version of DVDFab. The last V3 release was in October of 2007, soon to be 2 years old.