Your mencoder installation is missing some codec to convert wmv file to FLV format. You may need to reinstall mencoder.

Code:
/usr/local/bin/mencoder '/usr/local/apache/sites/client127/freexxxhunters.com/htdocs/vid/video/asian_wantsex_1.wmv' -o /usr/local/apache/sites/client127/freexxxhunters.com/htdocs/vid/flvideo/11899377461105091633.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 -lavfopts i_certify_that_my_video_stream_does_not_use_b_frames
Ask your server admin to run the above command and see if video with flv extension is created. If mencoder is installed properly, it will convert /usr/local/apache/sites/client127/freexxxhunters.com/htdocs/vid/video/asian_wantsex_1.wmv into /usr/local/apache/sites/client127/freexxxhunters.com/htdocs/vid/flvideo/11899377461105091633.flv