fetch() method doesn't work with Parse.com (similar to Backbone.js)

I am making simple Todo application. I want to fetch data from Parse.com. The table is as below: And I tried to fetch data, but this doesn't work: Parse.initialize("xxxxxx", "xxxxx"); var Task = Parse.Object.extend({ ... }); var Tasks = Parse.Collection.extend({ ... }); var TaskView = Parse.View.extend({ ... }); var TasksView = Parse.View.extend({ ... }); var AddTaskView = Parse.View.extend({ ...