pitching up

[v2flier]

While flying in moderately fast foward flight with an Align 450 flybarless 3G system it pitchs upward suddenly I mean strait up before I can correct it.I've tryed adjusting pitch gyro up to the point where it ossilates rapidly in hover and adjusted gyro down to where forward flight it pitchs down violently, their's only a small adjustment range that suits my low skill level.Increasing rotor speed helps reduce pitch up tendency.I believe Ray Hosteter called this "disc blowback".I'm unable to access information on the computer disc that came with the system my computer simply refuses to read the disc.Until I find a solution I'm restricted to slow 12mph or so forward flight.Any helpful imput would be appreciated.