Perplexed. Why is my helo gunner not doing anything?

[Dongolev 10]

I'm on the mission "The Great Battle" and there are all sorts of enemies firing at me. Why is my gunner not targeting and firing missiles at them? Is this a bug and if so where can I find the patch?

---------- Post added at 10:16 PM ---------- Previous post was at 10:16 PM ----------

Oh, also, the helicopter does not climb. Even when I hold down "Q" it just plummets to the earth. It also does not pull out of a dive. Do helicopters really fly like this or is this a bug?