If you moved the MachFive or MOTU Symphonic Instrument DXi plug-in from the location it was installed, it’s possible that Sonar lost the registered path. To reset the path:
* Go to the Start Menu and choose the “Run” Option.
(place the path of the DXi Plugin where “PATH” is indicated above).
You should get a message saying the plug-in was registered, and it should now show up in Sonar.