Arduino Mega ADK and Nexus 4 connecting with Accessory Development Kit

[system]

Hello is sombody here experienced in connecting an Arduino Mega ADK to a Android Smartphone using the accessory development kit?

I downloaded the Adk Demokit for my LG Nexus 4 from PlayStore but if i connect the Arduino running the ExampleProgramm from Google my Nexus dont recognize it and no Output from Arduino is send to the SerialMonitor...
Nexus only loads its Battery from the Arduino USB Port :~

Thanks