hi i have installed the last version of vshare, it's all ok but i have a problem with the thumbnail creation. i have read all post but i cant resolve.

with the avi file the thumbnail is work fine but with some file (no all) wmv and mpg the thumb not appear...
i have tryed to convert file with mlencoder and ffmpeg it's always the same( include--->setting--->video_conversion.php)
durant the conversion appear this

Code:
Video id: 25

Find video duration - START

/usr/local/bin/mplayer -vo null -ao null -frames 0 -identify /home/mypornyo/public_html/video/mov1(2)amat.wmv

Duration (mplayer): 0

DURATION: 00:00

Create Thumbnail - START

Create Thumbnail with mplayer - END

CONVERT COMMAND: /usr/local/bin/mencoder '/home/mypornyo/public_html/video/mov1(2)amat.wmv' -o /home/mypornyo/public_html/flvideo/12103567251881533816.flv -of lavf -oac mp3lame -lameopts abr:br=56 -ovc lavc -lavcopts vcodec=flv:vbitrate=500:mbd=2:mv0:trell:v4mv:cbp:last_pred=3 -srate 22050 -ofps 24 -vf harddup
can you help me?? the site is http://www.mypornyou.com