Well if you jumped it at the Acc and it didnt kick, that means the Green wire has no power, the green wire comes from the control. If your fuses are good then its going to have to be something with the Control unit itself. I would check for power at the control unit on the green wire and just keep following it back till you find where the power stops.

Basicly the Green wire is what kicks the compressor, the only real control for the A/C system under the hood is the compressor itself and the low pressure switch.

Can you provider more info on the issue as to what youve already done, i read it doesnt kick when defrost is on which it should, Does the front fan kick on when you put the A/C into the on position?