Olly Chersnatch

i'm having issues with the servo control box, meaning i only get one main group control no matter how i configure the arms and the one group control moves every part, hinge, piston, etc, that i put on the arm. How do i make different servo controls to control each part individually. its probably something stupidly easy to fix but i just downloaded this package and have know idea what i'm doing wrong. any help is welcome thanks