For MuvAudio to work correctly over Remote Desktop, you must choose to "Leave the audio at the remote computer".

To do this on Windows XP/2003 Server:

1. Open Remote Desktop.
2. Click on Options near the bottom right.
3. Click the Local Resources tab.
4. Under Remote computer sound, select Leave at remote computer.
5. Click on Options near the bottom right again.

To do this on Windows Vista/7/2008 Server:

1. Open Remote Desktop.
2. Click on Options near the bottom left.
3. Click the Local Resources tab.
4. Under Remote audio, click Settings.
5. Under Remote audio playback, click Play on remote computer.
6. Under Remote audio recording, click Do not record.
7. Click OK.

After doing this, MuvAudio should load correctly on the remote computer and allow you to start converting files.