What version of the plugin are you using? Can you check Window / Settings-Preferences / Plug-in Manager / info and report the Name, Path, Vendor, Plug-In Version and 'for API version'?
If the plugin ships with Maya, you might want to try to use Autodesk support instead.
There is the open source Dynamica Maya plugin. It should work with dynamic and static meshes.
What version of Maya are you using? You can download the source or some precompiled binaries here: http://dynamica.googlecode.com
Hope this helps,