I wanted to start the scheduler at a specific time the other night, but no, nothing happened so I had to start the job manually later.
No job constraint (Alt, Moon, Twilight etc...) was set up.
I have tested with the simulator also, same problem.
When you added the job to the scheduler and hit the "play" icon, did the job indicate that it was waiting for the time? You should see the message in text box at the bottom.