Helicopter wont shoot

[GMagos]

Hello to everyone.I am playing a scenario which involves some AH-1 Supercobras.The problem is that although it seems that I have four shots for each weapon I cannot shoot them.The area fire doesn't work ,direct fire either.Some turns before I could shoot normally.There is LOS to at least 4-5 enemy units.They are infantry inside or outside buildings.Am I doing something wrong here?Everything else seems to work just fine.
Thank you in advance.