help with rails+sproutcore

I have been trying to use rails as the backend for sproutcore. I am following the tutorial:

I have followed all the steps in the tutorial. When I try to run the http://localhost:4020/contacts, its gives me the following console errors:

Contacts is not defined [Break on this error] Contacts.detailController = SC.ObjectController.create( detail-1...228318788 (line 18) Contacts is not defined [Break on this error] Contacts.ListItemView = SC.View.extend( list_ite...228318788 (line 17) Contacts is not defined [Break on this error] Contacts.masterController = SC.CollectionController.create( master-1...228318788 (line 18) Contacts is not defined [Break on this error] Contacts.Contact = SC.Record.extend( contact-...228319022 (line 17) Contacts is not defined [Break on this error] Contacts.FIXTURES = Contacts.FIXTURES.concat([ contact-...228318788 (line 9) Contacts is not defined [Break on this error] Contacts.server.listFor({recordType: Contacts.Contact});

Could some one please let me know what could be the problem.

Thanks in advance for the help Latha