Dynamic Playback using the Mod Wheel Expression Map setting

Hello all, I’m not getting any dynamic change when using the Mod Wheel Dynamics Expression Map. I’m using Spitfire Solo Strings and Spitfire woodwinds. I have this expression map selected for each midi channel. Any suggestions? I’m on Max OS X El Capitan, by the way. Thanks!

There are certainly some bugs in this area of the program, but things will be substantially improved in the forthcoming 1.0.20 update.