Help 3PKS

[Allan]

Alright all just wondering if anyone can help i've just purchased a futaba 3PKS with a 2.4 module and am having issues with servo's at the mo do i need to upgrade to digital servos or is their a way of getting normal ones to work? when i hook the battery up the servo starts buzzing tried 4 servos all the same and had 1 checked which was fine on another system

http://www.futaba-rc.com/radios/futk25.html

Any help would be greatly appreciated