HSO Keeps Going Out Of Tune

I am trying to route HSO instruments to their outputs to the Cubase mixer. I know how to do it but for some reason after a while the project and certain instruments (seems like all violins and cellos) slowly drifts out of tune. In other words the only way the project stays in tune is if I keep all instruments in Halion SE which completely sucks! I want to be able to route each instrument so I can apply EQ and anything else I desire but I can’t because half the instruments drift what seems to be 50 cents… what the fudge!?

Turned out my m-audio keyboard pitch bend went south and was random ing sending midi pitch end messages on its own. Warranty replacment came and all is right in the world again.