What did you use to convert the videos? They'll have to be mpeg4 or H.264 format. Some people have had this trouble when using Videora. I can't advise you at all on Videora (failed miserably & couldn't use it at all). I use 3GP converter instead, if you're interested in trying it there are instructions, advice & a link for download here
http://www.gnutellaforums.com/showth...=&pagenumber=1