weapon load out question

[claw 17]

I was trying to set up a mission. The plane: FJ-3M Fury; tasking: combat air patrol; map: Archipelago, Year: 1962; Loadout; air to air. According to the loadout.ini the plane should be loaded up with 2 fuel tanks and 2 aim-9B. The fuel tanks were there all right, but the sidewinders weren't. 

I couldn't add them manually. In "Stores available" the aim-9b was indicated but the quantity was set to 0. (I always thought that "stores available" was related to campaigns not to single missions). 

The data.ini for the plane shows it has two specific sidewinderstations (set for IRM, country: USN). 

 

Any ideas how I can get sidewinders on this plane? Thanks all. 

[PFunk 198]

The Archipelago terrain didn't include USN as a nation.  That may be a problem for you.

[claw 17]

The Archipelago terrain didn't include USN as a nation.  That may be a problem for you.

I forgot to mention that I tried it out on different maps with no result.

 

But the problem solved itself in this way that when I started the mission the plane DID have sidewinders. They just don't show up in the loadout-screen! I'm curious how that can happen.