Forum:Problem with Gun Runners' Arsenal

So I recently bought the DLC Gun Runners' Arsenal, downloaded and installed it, and restarted my game save hoping to find all these weapons. I slept a few times to allow 3 or 4 in-game days to pass, and then fast-travelled to Vendetron in Gun Runners, only to find that he still only stocks the weapons he originally sold.

I checked my version of the game: 00901, as specified in the U.K. Playstation Store. No problem there. After I installed it, I checked the 'Downloadable Content' button in the main menu of the game, but when I click it all I'm getting is a darkened box in the middle of the screen. Nothing else comes up. I figure this is normal, since GRA is not necessarily a mission-based DLC. It simply opens the Gun Runners' Arsenal to the player.

I'm not sure what else to try. I only bought the game a week ago, and didn't update, so I'm still on version 1.0. Would that be the problem? I don't necessarily want to update because I'm hearing bad things about all updates with the exception of 1.6. But if it's necessary to get the guns, I'll do so.

Any ideas?

Dan.