Dvd-video faild

vbimport

#1

i have nero 5.5.8.2
when i make an video dvd with nero and i take several vob files and put it in the directory and push burn i get the folowing messagge:

DVD-Video files compliance test failed

does somebody knows what i am doing wrong?

the vob files are small movie trailers ripped from an dvd.
greetings:

martin senders