Last friday I've bought the Revolution DLC on PS Store BR, because my PSN account is BR, for R$30,00( ~= U$15,00). I've installed it, but when I run the game it does not identify the DLC. Now I discovered that this DLC is BLUS31141 (for the brazilian version of black ops) but my game is BLUS31011. Is there any way to run this DLC on my game or did I just lost my money? (sorry if my english it's not understandable)
No. The DLC that you purchased is not compatible with your game disk. You can't exchange it for the correct DLC, or get a refund. The PS3 can play almost all imported games, but you can't use DLC with imported games unless you can purchase it in the Playstation Store for the country that the game disk was intended for originally.