Newbie respond_to question

I am sending data from a grid back to /configuration/edit/id

This works, the data gets to the server.

The problems is that my jQuery setup:

  $.ajaxSetup({     url: '<%= params[:id] %>.json',     contentType: "application/json",     dataType: "application/json",     success: function(msg) {       console( "Data Saved: " + msg );     }   });

and controller

    respond_to do |format|       begin         format.json {             # some logic here         }         format.html { render :action => 'edit.html.erb' }       rescue      end

gives me an ActionView error.

So, data goes to server from jQuery, but then the server side error. No idea why it's reverting to edit.erb

Any help appreciated.