WFG,
I had a problem with my DC4HD also. One of the internal relays was toast, so the outlet was not getting any power. Have you checked the outlet with a multimeter to see if it is getting power? Talked to Curt and he had me send him the broken one, and he sent a new one out.
I was also having a problem where my lights would turn on/off when they shouldn't be. A firmware update from Curt fixed it.
Also, I am sure you have checked this, but have you looked at your programming statements to ensure that the outlet should be on?
Also, have you tried plugging your MH's into another outlet to ensure that your ballast hasn't blown?
Mike