ABL Servo not responding

[Schnupp]

Im trying to get ABL working on my rambo board. I read through a few rambo ABL threads and followed the zennmaster guides. My servo does not respond to any commands in pronterface. I think the culprit is either in my pins.h or with the servo im using. Its a high torque metal gear micro servo so it probably pulls more current than normal. When I move an axis the servo has some terrible chatter. Any help would be appreciated.