On the last normal mission where you get to fly the V-Wing, I have to problem that my secondary weapon will not fire. I have remapped the keys, made sure there were no overlapping key's mapped and have no idea what could cause this.

No joystick or any other controllers are in use, just keyboard and mouse.

I noticed that the cluster missile will shoot if you use the v-wing in another mission, but they aren't seeking in that case.