MGS4 re-use weapons after beating game?

Ok when i beat Metal Gear solid 4 it said i could use all the stuff i got during my first playthrough the next time i started a game, and yet when i did i didnt recieve anything but what you normally would get... help?

You must load the last save you make from beating the game, instead of starting a whole new save.
So how'd you like the ending? It was kickass, Old-School like. And it played all he themes from the previous games.. great stuff.