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Problems with TowerPro SG90 servos and Pololu Mini Maestro 24

Hi all,

I am in the process of connecting up 18 Tower Pro SG90 servos to a Pololu Mini Maestro 24 controller to complete my build of a Plen 2 (Custom redesigned to fit the above servos and allow space to carry the controller).

I am using an adjustable power supply that has voltages of 3, 4.5, 6, 7.5, 9 and 12vdc.  The label says that the output is 300mA 3.6 VA max.  I am suspicious this could be my problem detailed below.