why does it say "failed to open sound database" when I've deleted the event-files in data/sound-folder?

I've installed RTW 6.0 Gold, and on top of that the music pack, but the music pack dont work for some reason and I tried to delete the event-files as people say you should do before your own music should work...help? I need to make this work again so my music pack will be complete in a near future!