Could this maybe be some kind of a network problem?
I cant follow it all in german but i think you try to mention that when you assign in this case key "a" to the function for heading up in your fsbus setting and you push it it will not show the same speed as you would see it in your screen?
First of all i already noticed that the basic boeing 737 panel sometimes is lost with the real hardware... this is als something you have to forget your hardware will show what is real.
If it would work with the mouse ok than there wouldnt be anything wrong on the pc you run it on.
If you have a delay in your network it could cause this... even if i would need a bit more info to be sure.. could also be you run everything on the same comp or that your wideclient is not equal to your wideserver
So maybe you can tell a bit more what you all have done and what you exactly have assign in fsbus router to try to help you more..
gr.
Frans M
www.airbus320.nl