First, change the contoller type by right clicking on the controller title and clicking configure controller. There will be two drop down boxes, one for type and one for protocol. For type, select RGB Light Controller. For protocol, choose the appropriate DMX adapter you are using. Then click OK. Then right click on each channel and click configure track. You will see three colored boxes. Set the numbers in these boxes to correspond with your RGB channels. Let me know if you have any more questions.
Ryan