mission help

[Ace in training]

Ok for starts i absolutely love this game, i come from a family that has a great deal of avation experiance and this game gave me a chance to step back in time to see how air combat was in the good ol' days lol. But to the point ive been playing on through the game till i get to the mission "into the hornets nest" located in the battle of stalingrad campaign and cant seem to get through the mission. For a little over view your in a bomber and its night with lights pointed toward the sky, the order is to intercept all transports and bring them down. I believe that i bring all the planes down but it still says that some of the transports have reached the soviet town of there destination... Can some one tell me if im missing something please.