Well thanx for getting my hopes up for nothin, Joshy!

Jeez, you should go into advertising. You could make a killing.
Anyway, this is a tough game. I've found the "box of mystery", the empty CD case, the paper with the URL, the small golden and silver keys, the ordinary key, the power cord and the "thin ring with sculpture". I used the small keys to open the drawers, and put the ring in the indentation on the box. But now
I'm stuck. I can't open the box or the door. What do I do?