I installed a New Sony HU(Radio and CD), and cannot get the power
antenna working correctly.

I installed the unit with a diversity adapter for the antenna.

I noticed the when I plugged the unit in without the ground the
antenna extended.
Then when I grounded it teh antenna went back down.

I thought the grounding would solve my problem, but the antenna does
not come up.

I checked it with the old unit and it works fine.

Any suggestions?

Thanks in advance.