mic ducking effect in ableton

[rhythmtech]

can anyone explain to me how to set up a ducking effect on a mic in ableton? really need to get this sorted so anyhelp would be great.

[loopdon]

dunno if this helps -

http://otium.hjem.myinternet.dk/mirror/Ableton-Live_and_Compadre_Sidechain.zip

it'S a movie using the compadre compressor vst.. :)