Dragon Age Origins PS3 DLC - Stone Prisoner?

Hey, when I bought the game it came with 2 codes (blood dragon armour and stone prisoner) Ive downloaded the armour but every time I put in the stone prisoner code it keeps saying its invalid? Ive checked the code is right loads of times and I put hypens in. WHY DOESNT IT WORK?|||hmm only thing i can think of is thats it expired already that game came out i november of last year its not march with nad expansion of dragon age due out in 2 weeks..so they might have cancelled that code..i honestly cant think of another reason why its not working./...try caps and lowercase because there not much else you can do except buy it for the psn...|||check the expiry date thats the only thing i can think of