Controlling Devo 7E transmitter from a PC

Hello,
i'm trying to control my Devo 7E via my PC using an Arduino, the following software and instructions:
www.min.at/prinz/?x=entry:entry130721-182227

The problem i have is this: The Devo joystick throttle, controls the servo i'v connected to the receiver, but when trying to control the servo via the PC software, the servo moves a little bit after a delay and then the Devo goes into restart.

Can anyone help me here?

Thanks!

Are you using the stock firmware or deviation? If deviation, what version? If not deviation, upgrade to deviation and we can help

i'm using devo7e-v4.01

That's a very old version. Recommend installing the latest nightly build.

That said, the PPM input code hasn't changed in a long time. Never heard of any PPM input causing a reset, so recommend double-checking the signal and ground connections to the trainer port. Do you have any way of checking what the PPM signal from the arduino looks like?