Windows in 2006 Ford Escape won't go down?

None of the windows in my 2006 Ford Escape will go down. However, they will go up and down if the driver's door is open. Also, this is an occasional problem; the windows will work for a while, then one day, they will stop. I have checked the fuses and the connections, and all are fine.

All the connectors are not fine. You have a loose or partially broken wire in the harness going to the drivers window switches.

Us ethe ignition key to lower the windows and raise them.