The Office

I looked at the small sign next to the office door.
"Dormitory administrationm - please knock before entering."
I wanted to register, I needed lots of documents, so the most sensible choice seemed to contact the administration office.
I knocked - no reaction.
I checked the opening times again - there should be someone there.
I knocked again, this time a little louder - again nothing.
Carefully, I tried to open the door.