GPWS Missing sounds Fix

Two times I've LOST all the GPWS sounds in PIC... The fix I've used has worked two times now, so It has to be a fix and not just coincidence.What I did was CHANGE the IRQ for my sound card from 5 to 7, reboot, start flight simulator, exit flight simulator, restart again my machine, change IRQ back to 5 start flight simulator, test, voula.. fixed.Both times (when I changed the IRQ) Flight Simulator took longer to load (as if it was initializing something) The way I changed IRQ's was using my BIOS option to assign IRQ's manually.Anybody experiencing this problem should give it a try.