I GOT THE SOLUTION TO ALL OF THIS!!!
plase look at this topic:
http://www.mympxplayer.org/-how-can-...d--vt5157.html
and espacily avionik99 post.
after a long time of trying i managed to transfer videos to my player, and it works great, thenks to his post.
leave the aviconvertor, i found it is very uncomfterble program.
try xillsoft mp4 , or I AM TOO mp4.
alon.