Delnol

So I've been trying to get a title update, checked the instructions, downloaded TU from xbox unity, copied it into hdd1\Cache and scanned for TU's before launching the game, but the problem is that after all of this I can't enable an update. When I press Y on a game and check for an update, there's nothing, I can't enable it. So when I launch the game it shows TU:0. Created a TU folder (000B0000) and copied TU there, but still no result. Does anybody know what might be the problem?