I've looked at tutorials at youtube how to apply sidechain effect, it works within its own frames but I don't know how to get the effect on my virus sounds. I'm using drums from my slaved reason thats rewired into ableton (via 1 midi/1 audio channel). I add a compressor in ableton to my pad sound from my virus and select sidechain, and source from the audio channel (drums - reason). But i don't get this to work... Am i missing something? Do i need to bounce the sound or something? I have added a channel that allows input to the virus but I really dont know how to utilize it in this case 
*solved*