I'm trying to get the achievement Darkness Returns and the big door behind the Nightingale Sentinel won't open. And I cannot continue on with the quest. I've talked to him and everything. I even picked up Nystrom's Journal. Can anyone help me? I really don't want to make a whole new character and find my way back to the Twilight Sepulcher.

Thanks in advance.

I don't mean to double post or to bump my topic... but can anyone help me out? I really need to get past this quest.

You can try the hardware + software forum, and if not check that quest's bug list here http://www.uesp.net/wiki/Skyrim:Darkness_Returns

Try asking in the spoilers section? That is after all what you are asking for.

I'm not sure specifically because if you have spoken to the Sentinel, it should prompt the quest to have you go forward if it is the quest you're currently on. The journal helps you, but it just gives you clues on how to follow the path correctly.

Its not really a spoiler... because its not part of the main quest. But thanks for the response. And its just really irritating because I've tried everything and nothing is working.

she opens it i believe if you haven't walk behind here kinda pushing her till you get there i had something like that happen in another quest that how i fixed it

Thanks for the link! It helped me out a lot. Right here is what happened:

BUGS:
Entering the Twilight Sepulcher, hearing the first of Gallus's dialogue, then leaving will cause the door to the Pilgrim's Path to stay closed and never open upon returning. This will be caused by "Nightengale Sentinel" being replaced with "Gallus" after exiting dialogue with him. Speaking with the "Gallus" version of the sentinel with all topics will NOT cause the door to open, because he does not have the proper permissions.
SOLUTION (PS3 & Xbox): If you go to the right around the door of the Pilgrims Path you will see a glitched area that can appear blue. You will also see the inside of the Pilgrim's Path. Use the Whirlwind Sprint Shout to jump the gap and gain entrance to the path. Falling will either return you to the entrance area, or will kill you, depending on how you fall. Objective will not reappear until you talk to Nocturnal near the end of the quest.

Now after Nocturnal speaks nothing happens... WHY ME!