need help on James Bond - AUF

I\'m on level 9 of Agent Under Fire...And I keep dying right at the end...
It\'s called Forbidden Depths and u r in the moving vehicle and u have to shoot Nigel Bloch and he runs into the tower and you kill the guys and get the missle launcher with the camera attached...
well I\'m stuck trying to kill Bloch as I don\'t know where to fire the missiles...
I don\'t know where he\'s firing from as he keeps killing me as well...
If anybody can help then I\'d be grateful...