       envHelpers.detachSocialChannel @workspaceData, (err) =>
         throwError err  if err
 
-    callbacks.success()
+    callback()
 
 
   handleCollaborationEndedForHost: ->

    @setMachineUser [nick()], no, =>
      throwError err  if err

    callbacks.success()


  handleCollaborationEndedForParticipant: ->

    @cleanupCollaboration()


  endCollaborationForParticipant: (callback) ->

    @broadcastMessage { type: 'ParticipantWantsToLeave' }

