It works fine when I use the mouse to press the keys on the Kompact sampler that came with Eastwest but when I play the Yamaha the sound cuts in and out seemingly at random. It works for a few minutes and then stops or sometimes the keys on the sampler get "stuck" down when I'm using the Yamaha. Is the Keyoard just old and faulty or could it be a problem with the audiophile, the drivers...? Any advice would help, thanks