Classic British Flight Sim

Dave, could we have been looking at different versions? I have the Trident 3, which comes with two aircraft.cfg files as mentioned, but I downloaded the T.2 just now (from dmflightsim as always), and that only has one - and that one is lacking camera definitions, so apparently it is a FS9 file ...

Curiouser and curiouser... I looked at the TRIDENT_3_20081209 I have, and I note that there are two aircraft.cfg files in it. The one named aircraft.cfg.fs9 doesn't have the camera definitions.
Never mind, everything is in working order now, and I can focus on understanding the AP*s Descent Mode ...

Dave, you have me a wee bit puzzled here. Do you refer to the [CameraDefinition.n] entries in the aircraft.cfg file? In my downloads, these entries are identical in the Maltby Trident 3 (TRIDENT_3_20081209) and Dave Evans' mod files (Trident 3 folder in tr23fsx; unknown date but downloaded recently).

Gentlemen!
Everything now sorted, thanks to your kind suggestions. I followed the time-proven maxim of erasing everything, then made a fresh install but without those dubious Evans files. And lo and behold, the sounds are there both at take-off and at (auto)landing. They are perhaps a little weak ...

Thanks for your quick reply, Dave!
I thought that the Evans modifications were necessary in order to make the Trident work in FSX. David Maltby's homepage, where you download the aircraft, mentions the need for a change of the path for the sounds, and I think I have managed that.
Hoping for someone ...

I've downloaded and installed the good old Trident, including the Dave Evans modifications for FSX. It works beautifully, except for one thing: the sounds that you are supposed to be able to toggle with an icon (AUTO12, DECIDE, RADIO500, and so on) aren't working.
What can I do to remedy this?