This has been a known issue <img src="/ubbthreads/images/graemlins/disagree.gif" alt="" />
The easiest way to fix this is to enter the battlefields and then exit again...
Other things that sometimes fixes the problem:
1. Casting a spell that has a sound effect
2. Going up or down stairs
3. If there is an area that is "peaceful" like a town. Run in and out of the town (it triggers different music files to play).
Hope this works <img src="/ubbthreads/images/graemlins/smile.gif" alt="" />
