I truthfully think the solenoid may be bad....... I would take it off the tank and possibly plug in the solenoid in and out of a different socket a few times. If it is working, you should hear a slightly buzzing sounds from it and a click if it opens and closes as Dark said.
Not sure if this is possible, but anyone ever heard of water from the bubble counter getting into the solenoid?
-Just another day in paradise-