This is the only mission i havent gotten gold in and im almost done with the career part of the game. Every time I get to the third cargo, it is not there. I have went through and done everything perfect, but i cant get gold. The only thing I can think of is if there is a time limit to get to the third crate..... Can someone tell me what I might be missing or write a walkthrough for this mission? Thanks

Is this the grenadier mission? Please be more specific as to what your problem is so I can help you better.