Board Thread:Questions and Answers/@comment-5.54.10.160-20140130030650/@comment-1824272-20140130140440

The number at the end of the code should not matter. What matters is the letters. BLES or BLAS. Those should match with your copy.

Your DLC in Assault Horizon will not show up if you don't also download all of the Compatibility Packs. You need to download all eight of them (I think there were eight) for the game to recognize your DLC. That should be the problem.

PlayStation Network Support might not be able to help with this kind of issue.