Problems converting .mov file

[Interrobang]

I'm having problems converting a .mov file using ffmpegX.
It doesn't seem to matter what type of file I try to convert it to - although I've tried both mp4 and dv. The encoding seems to go fine, this is the process information:

FFmpeg version CVS, Copyright (c) 2000-2004 Fabrice Bellard
Mac OSX universal build for ffmpegX
  libavutil version: 49.0.0
  libavcodec version: 51.9.0
  libavformat version: 50.4.0
Thu Jan  1 20:49:54 GMT 2009
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/Users/Shaun/Desktop/New.mov':
  Duration: 00:01:32.5, start: 0.000000, bitrate: 8076 kb/s
  Stream #0.0(eng), 24.00 fps(r): Video: h264, yuv420p, 640x480
Number of stream maps must match number of output streams

However, when I try to run the new file, I get the following error message:

The movie could not be opened.
The file is not a movie file.

Any idea what the problem is?

[Interrobang]

Just figured it out on my own - the problem is arising because I have audio encoding on when there is none