Sibelius 6.2
Windows 7 Professional 64-bit
4 GB of Ram

When I use the ";export audio"; feature in Sibelius for my percussion score, the resulting .wav file is not able to be played back in any player. When I convert it to an mp3, it contains about five seconds of silence. I have used the export audio feature before with success. How do I fix this?

Does it happen with multiple scores or just one in particular?

With multiple scores. I have gotten it to work in the past though.

I wonder if the playhead is not positioned at the beginning of the score, resulting in silence from being at the end of the score. That may be a long shot, but something to check.

You might also want to check the Sibelius forums for ideas:
http://www.sibelius.com/cgi-bin/helpcenter/chat/chat.pl?groupid=3