Doesn't follow the FPLAN LEARJET 35A (resolved)

[Dennis98BE 6]

Hi all, first post, first problem wich I can not find the solution to..
I finally bought the Lear and also the GTN. Everything of the autopilot works (VS, ALT SEL, ALT HOLD etc.) but not the NAV. 
In some sceenshots you can see what I have turned on in order for it to normally work. Can someone please give me any insight?

[YMMB 234]

I really don't know however do you need an active frequency in one of the nav radios?

[Dennis98BE 6]

3 hours ago, Dennis98BE said:

[RESOLVED]  The issue: in the .ini - ''Masterdevice'' was ''=false'' changed it to true.