       response = 
         success: true
         problem_list: [
-          {location: 'i4x://MITx/3.091x/problem/open_ended_demo', \
+          {location: 'i4x://MITx/3.091x/problem/open_ended_demo1', \
             problem_name: "Problem 1", num_left: 3, num_total: 5},
-          {location: 'i4x://MITx/3.091x/problem/open_ended_demo', \
+          {location: 'i4x://MITx/3.091x/problem/open_ended_demo2', \
             problem_name: "Problem 2", num_left: 1, num_total: 5}
         ]
     else

  get_next_submission: (location) ->
    @location = location
    @list_view = false
    @backend.post('get_next', {location}, @ajax_callback)

  get_problem_list: () ->
    @list_view = true

      score: @score
      feedback: @feedback_area.val()
      submission_id: @submission_id
      location: @location
    
    @backend.post('save_grade', data, @ajax_callback)

