SVCD problem (converted from VOB)

[Ecio]

long post, sorry:
i have just bought Mustek v520 dvd player and im doin some test to understand what it can play.
1) matrix trailer divx 2 svcd with tmpgenc and standard svcd pal settings -> OK
2) svcd nero image (with subtitles and 2 audiotracks) downloaded from vcdhelp -> OK (worked perfectly also sub and audio)
3) svcd made from a friend of mine (dunno how, prolly with CCE) -> images always shaking

i thought it was caused by some erroneous settings, then i tried to convert a movie trailer (vob) to svcd
i used dvd2avi to create the d2v and audio track and
then opened it with tmpgenc 2.01 and, using the standard pal svcd settings, created the mpg
then i burned it with nero svcd

the result is very poor : sometimes (NOT ALWAYS as my friend's movie) the image is shaking or some frames are lost.
i cannot understand why this fact happens, 'cause svcd iso and my first test were right..

thank u in advance and sorry for the long post

[Shabubu]

Just to make sure, are the VOBS PAL ??

[Ecio]

yes they are...