Problem Solved:
Just thought I'd post back with the resolution just in case anyone else has this problem.
Roland CY-8 cymbal with TD3 module & Superior Drummer choke.
You have to go into Sonar
Options > Global > Midi > check/enable Aftertouch.
NOw go into Superior Drummer 2 select construct view, right click the cymbal that you want the choke function to work on. To the right where the box says Envelope, tick the aftertouch switch, then in the upper right corner of the envelope box click tiny square to highlight.
Now set the envelope release to 0.1. To do this, grab the box in te envelope panel that is located to the right, slide the box all the way to the left. You envelope gui should now look like a square.
Done deal..
Hope this someday helps someone else out

Thanks all..