Ah, yes, the constant complaint. When you come up against a situation where you've checked off everything you can on the task list and no one has anything to say to you besides "What's up?", it usually means either there's a puzzle you were trying to avoid or have forgotten, or there's an area you haven't explored yet. In any case, here's some things to try if you're stuck.

-- Talk to everyone about everything, including on the phone.

-- Check the Messenger program in the museum office and the notes on Grigor's tablet for new messages.

-- If you haven't yet found the Underworld, track down the lift's remote.

-- If you have found the Underworld, explore every inch of it and solve every puzzle you can.

-- If you haven't done so yet, get into the Workshop and explore that too.

-- If you haven't gotten fired, here's a checklist showing the actions that lead to that eventuality.

-- If you've done everything and can't find any more puzzles, it might be time to trigger the endgame.