I've been having some trouble with the gunner on RHS helicopters. The AI refuses to use the ATGM. I'll lock a target (say, a tank), but the AI won't aim the missile at the target. If I fire the rocket it merely goes out unguided, despite having a "lock". The helicopter gunner will however attempt to engage a tank with the cannon, but that usually doesn't go well. The gunner works fine on the base helicopters. I've tried uninstalling and reinstalling the game and the mods, only running RHS, nothing seems to fix this problem. I reported the bug as well, but they couldn't replicate it. If it would help, I can upload a video later of the glitch. (occasionally the missile will fire guided, but only if I'm really close to the target.)
As a further note, I do not have any of the paid ArmA DLC. Would it help if I got it, particularly helicopters?