This is gonna sound silly, but...
Before you get to the main mission of "Counter Attack - Fleet Attack", you get an interception mission with 4 ships. I've tried everything I can think of, but as soon as you destroy the 4 ships, it just says 'mission failed' and I lose the chance for the main mission!!
Please Help!!

The first time I played the game, I got that exact same thing. The second run through of the campaign, I got it again. The third time I played that mission, it let me through. To tell you the truth, I really have no idea as to why that happens. I'm not sure if it has something to do with the speed in which you execute the attack, or who you play as. Otherwise, there's nothing I can tell you other than that. Just keep going at that mission with different aircaft and at different speeds.

Thanks - It was beginning to drive me mad - I've tried both pilots and at different speeds, but now at least I know I'm not just being stupid...