I just bought a Vocal exp.brd. for my XP. I checked out all the sounds and they seem to be working fine, but then I get near the end of the patches and there are about three or four that won't sound when I hit the keys...then I'll get a sound finally and then nothing again. Is it broke or is it set up wierd? I thought maybe the velocity was set real high but I don't think that's it because I was practically pounding on the keys trying to get the patches to work. What do you think?