pc4k compressor can't be adjusted while auditioning??

I must be doing something wrong. I just got the bits downloaded and installed. I added the pc4k s-type compressor to a track, solo'd the track hit play and started tiddling the pots. When I change the ratio the sounds starts to go crazy. I hit stop, I hit play and it's smooth... I twiddle it goes crazy... I hit stop, play... now smooth again.
 
I'm using Sonar x64 producer on Windows Laptop that has worked fine for most things that work in the past.

Ok maybe I'm back to the effect. Maybe it is just crazy pumping and breathing. User error strikes again?

nope I had it right... down side chain is off. the hover tool tip spells it out.

Do you ever get the feeling your all alone?
 
Im sure its installed correclty. Its probalby just the way its set up. Pumping and breathing are effects that are caused by a compressor that is set to do so.
To make sure its working correctly, insert a compressor in the track's Fx bin and set it up with the same exact settings. If you hear the pumping and breathing, then you have your answer.