IPad 2, Axiom 25, camera kit, power supply = STILL power issues

Hi,
I have read a lot of the river views regarding the power problems associated with the iPad and maximum MIDI controllers from them and. I tried some new conventional instructions, And did the following:
- acquired a 12V power supply (at 750 milliamps)
- got the iPad  camera connection kit
I also have a powered USB hub, but with the  can locate and external supply for the midi controller I'm not sure how that would be necessary anymore.
Nonetheless, when I  plus the Axiom 25 into the iPad through the camera cit, I am presented with the following:
"Cannot use device.  USB Axiom 25: the connected device requires too much power"
Ugh.  Really?  It's externally powered, I plugged the USB into the camera kit [I]then[/I] plugged the whole assembly into the iPad, as I read to do.  And still?
Any ideas on what I'm doing wrong?  Is it the milliamperage on the power supply?  On M-Audio's Axiom user guide it specifies 250-300 milliamps, so more that that wouldn't matter right?
Thanks in advance,
Tom

Not sure if it will make a difference. I do know the USB via dock connector is limited as to how much power it can supply in order to conserve the ipad's battery life.

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