Do not use instructions for versions prior to SONAR X3. Undo, setting the plug-in as a synth. Stutter Edit should be configured as an effect.
- Create a new project
- Add an audio track with some audio data
- Add Stutter Edit to the FX Bin or ProChannel of the audio track
- In the Stutter Edit plug-in header select "Enable MIDI Input" from the VST2/3 drop down
- Add a MIDI track, set the input to your MIDI controller, set the output to Stutter Edit, set input echo on
- Start the transport and play some notes on your controller.
I would recommend creating new threads rather than bumping old ones.