Reply to MPK25 - mapping pads and keys to different channels. how??!

Hey guys,

Just got an MPK25 and got a question. When i load just sylenth in ableton for example I can play the keys. When i only have drum rack opened i can use pads. But when two channels have midi - everything stops working and i cant control neither keys nor pads. how can i select which channel is controlled by pads or keys?

Much appreciate any insight. looked through literary every resource and cant find an answer.

thanks