Problem Converting

[stuckpipe]

I have a window video file that works fine in Windows Media Player but when I try to convert to MOV(450) or MPEG_4(800)P4 or ipod HQ(450) the video file converts but only plays audio despite the Convert to Video File being checked. I have Replay Converter 4.2 and the log files shows
Sat Dec 31 10:22:14 AM error while decoding stream #0.1
error while decoding stream #0.1
error while decoding stream #0.1
error while decoding stream #0.1
error while decoding stream #0.1
error while decoding stream #0.1
error while decoding stream #0.1
error while decoding stream #0.1
error while decoding stream #0.1
error while decoding stream #0.1
error while decoding stream #0.1
error while decoding stream #0.1
error while decoding stream #0.1
error while decoding stream #0.1
error while decoding stream #0.1

Sat Dec 31 10:22:18 AM Conversion complete.
Sat Dec 31 3:55:33 PM Online
Sat Dec 31 3:55:36 PM No updates found
Sat Dec 31 3:55:36 PM
Sat Dec 31 3:55:36 PM Replay Converter version 4.20 07-27-2011
Sat Dec 31 3:55:36 PM Operating system = Microsoft Windows XP Home Edition
Sat Dec 31 3:55:36 PM User has registered version



Any idea why it will not convert to a video format for Quicktime or iPods?

Your help would be appreciated.