Mega ADK USB problem

Hi everyone,

I've been playing with a Mega ADK and it suddenly has stopped working. Now the board works as a Mega board perfectly, but whenever I try to use the accessory mode it freezes. Calling the powerOn() function stops the execution, I call it from the setup and it doesn't enter in the loop. The devices attached to the ADK board charges (thus, +5v usb works) but doesn't receive any information about any USB device. The Demokit app for Android does nothing but waiting for the device.

Any idea of what could this be or what to do with this? It worked on an HTC phone, I tried to connecto to a Asus eeePad Transformer and that was the beggining of the problem, now it doesn't work in the phone nor in the pad.

Thanks in advance!