[Sparks333]

Hi
First off, make sure your backup batt is putting out 7.2 volts - maybe even more if it's fully charged. Otherwise, make sure the plug is in the right hole and in the right direction.
More: The camera itself actually runs on 5v, which explains the regulator but the servos that it controls and provides power for need the 7.2v. you can get a hold of a 7.2v regulator if you need to run it for prolonged periods, but I personally wouldn't try to stick it into a digital IO or analog.
Follow the datasheets and recommendations.

Sparks