Just got the superflower fan controller (check tomshardware review), and realised that most of my fans get power though a 4pin adapter, so i tried plugging one into the 4pin for power and 3 pin on the rheostat for controll and it didnt work. DO i need to get a 4pin -> 3pin adapter? Or is there some other way to get the rheostat to control speed of a 4pin fan? Thanks