Found out and i did it this way and it seems to work:
Did my flightplan with LNM and saved it as MSFS pln.
Load the PLN file into the Flightplanner and so we have a GPS pln route.
Start the flight set the HDG,NAV,TAV1,VOR/ILS Selector knob to NAV and set the Radio Beam coupler switch to "RANGE Loc" and this seems to work.
That Radio Beam coupler switch is near the Autopilot panel ( captain side ) under the Throttle panel - hope this helps for others !

cheers  ;)