Hi.Are you using samples in pa 800?
Try to reinstal latest OS and resourses.If it is again the same problem,your ram might be gone.
While I had pa800, I never had problem with it.But,I do know a lot of players had problem with ram.
But,than again it could be something else.Try to install everything again.
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MIKIMIKI
TYROS 5,BEHRINGER X32PRODUCER,YAMAHA DSR112,JBL PRX618s XLF,EV ZLX12p,SENNHEISER E945,....ETC