I need some help about mission 1
I have completed this campaign many times before.I must say I love it very much.But when I wanted to play this game again, I found that many details had changed.When I tried to do dog fighting training with Saint,I hit Saint twice with Sidewinder in SIM mode,then I switched to the cannon,armstrong,I try to hit him,but whether I press the trigger, the spacebar, or the weapon release button,there's nothing happened.I want to know how to "knock it off" after the cannon is aimed at him.