I have had a quick look at Fabfilter PDF manual and cant figure out how to side chain signal using that application (I currently use Quadro in cubase SX3 but am looking for a better way of doing it)
how do you route the kick signal to squash the autio track using this?
I'm guessing that you have set up your quadro channel correctly with the busses activated in vst connections and put the pro c in an insert.
Make sure that it is the (SC) version of fabfilter pro c . hit the expert button to open the expert panel then change the sidechain to ext.
thats you ready to send your signal bud