[SOLVED] Cannot Load/Unload Logistics Trucks.

[FAT HEAD]

I enjoy doing Logi runs. It's a nice break from the action to waltz back to base in a truck, talking to a buddy or listening to the engine.
However, I'll get to the Vehicle Repair Station as instructed, and click to load materials.

Nothing happens.

In another hypothetical, my squad drives a Logi to a FOB location they want to set up. SL tells me to stay in the truck and unload once radio is down.
Wait for the go, click on the ammo and construction supplies aaannnd
NOTHING.

I have no clue why this happens. Both of my friends on steam I play this game with often say that it works fine for them when they do it. They tell me how to, and I can't.
It's consistent, I've messed around in the Training Grounds, set up a radio, got a loaded Logi, ran it up, and it didn't do the thing.

I've reinstalled and verified cache, I just have no idea where to begin to fix the problem. While I can live with it, I take pride in being the one to step up and do these runs. Knowing I can't like a cripple is really disheartening.
I have googled the same details and have found relatively nothing on this subject, as if no one else has this problem.
If I could have any insight, I'd appreciate it.

UPDATE: USE YOUR NUMKEYS ABOVE KEYBOARD TO SELECT RESOURCES. Scrolling doesn't do it for everyone.

[Dangfoe]

You click as in Press and Release the button? You need to hold the button pressed for the duration of loading or unloading. To fill up the truck you need to hold the right mouse button for 5 seconds or so.

[FAT HEAD]

Publicado originalmente por Dangfoe:

You click as in Press and Release the button? You need to hold the button pressed for the duration of loading or unloading. To fill up the truck you need to hold the right mouse button for 5 seconds or so.

Yes. I hold the button for up to 10 seconds and nothing happens. :/

[Dangfoe]

Have you tried to reset the keybindings?

[FAT HEAD]

Publicado originalmente por Dangfoe:

Have you tried to reset the keybindings?

Tried, no go.

[FAT HEAD]

FIXED. Used my numkeys to select the resource and held. Works like a charm. Scrolling to it doesn't do it, must be a bug.