Well, I don't how where you got the commands from, but DataRefEditor doesn't list them, only DataRefs as the name suggests.
I checked my records and the commands are:
CL650/FCP/crs1_up
CL650/FCP/crs1_down
CL650/FCP/crs2_up
CL650/FCP/crs2_down
Or the defaults should work:
sim/radios/obs1_up
sim/radios/obs1_down
sim/radios/obs2_up
sim/radios/obs2_down