Strange. AE is supposed to work off of RF or EU. Maybe try using magmatic dynamos since you already have a lava system in place. A single magmatic puts out 80 RF/t, but it can be upgraded to output 320 or 640 RF/t so you don't need to make tons of them. You could also use an extra utilities lava generator, but it is not upgradable so if your system gets big, you would need more than one.
On a side note, ME controllers can't accept energy directly any more. To use RF or EU, you need to make an energy acceptor and connect your power to it. It is basically a power converter block. You need it when using any power supply other than the vibration chamber. Were you trying to power the system or an AE energy cell directly??