controls question

my first time here

and installed DCS world for the first time and would buy FC3 after become familiar with it dcs world.

my question is I have a logitech G 940 and have to appoint the throttles and the buttons to the game.

I already saw in the game that you can appoint.

but afterwoods it turns out that it didnot work

so probebly i have to do it different

could someone help with that

also i appointed in the keyboard minus and plus sign as zoom in and out

also these did not work

any help would be appreciated.