I bought the Cpt Sim C-130 for FS9 from Just Flight a month or so ago and have had a few very enjoyable flights when using ye olde 'warm start on the active runway' approach.
However, I felt it was time I started learning the ins and outs of this fantastic aircraft and run through the tutorials - both the Just Flight Lyneham circuit one and the one by Bernardo Srulzon at FSStation.
Everything went well with engine start-up (if a little dizzy after searching for relevant switches/buttons/meters

I hear the clicks from the cockpit sound, but nothing happens. I also can't swap the primary and secondary frequencies. On my previous 'hot-start' jaunts, I didn't use the radios at all.
I seem to remember having a similar problem in my early VATSIM excursions, but can't remember how I fixed it - if I knew at all.
I would ask on the JF forum but their 'support' has been sadly lacking in the past - and the Cpt Sim support is down for a month.
Any useful help gratefully appreciated.