The Door

I am doing the quest mansion delivery, and cannot get past the second door in it. any help?

 

Not sure which door you're talking about, but here's roughly how the quest goes:

Spoiler

First you can only enter the main door at night
Then you press the button on the side of the sofa-like thing in the middle of the room, which deploys the staircase to the second floor
Then there's a wood pressure plate behind some cobwebs, throw an item there to unlock the next door
Then I think it's just some maze and you get to the NPC