I think there must still be something missing.
BTW what is the difference between
Nav.2 =1,1,0
Nav.2 = 1,0,0
Might that be the problem?
If you look at the line below, it tells you what the digits mean.
// Radio Type = availiable, standby frequency, has glide slope
'1,1,0' means that the nav 2 radio is available, there is a standbye frequency, and it does not have a glide slope.
'1, 0, 0' means that the nav 2 radio is available, but there is not standbye frequency or a glideslope.
Basically, '1' means yes, and '0' means no. Make sense?
If you load up the default cessna with the default radio stack, you will see that the Com and Nav radios have a standby frequency that you switch with the frequency that is activated.
Now if the Connie's radio stack doesn't have a standby frequency, and it's enabled in the aircraft.cfg, you could be trying to change the active frequency, and if there is no standby frequency to change and swap over, it might not let you
