@william81
http://wiki.s1mp3.org//index.php/Video_encoding
Not all MP4 can play a video in "full screen" (using all screen size)...
I've never heard about this version problem. Maybe using a newer version? Have you tried v4.09? not sure if there is any newer... there might have been a bug on v4.05....
MP3 Player Utilities v4.09.rar