Control GRM Plugins in Max?

Jonathan Hallstrom's icon

I downloaded a demo of some of the GRM Plugins and they load and run fine in Max. I can change values via the Plugin's GUI and the ~vst object will print out a list of parameter names, but when I try to send messages to the ~vst object to change the parameter values, nothing happens. Is this because I'm using the demo version, or do the GRM plugins not respond to parameter change messages?