After solving a few problems, at last I can see my view but I came across another problem: I can't save my data (model) into a store. Here is my code:

Code:
        var currentUser= this.profileView.getRecord();
        this.profileView.updateRecord(currentUser);


        var errors = currentUser.validate();
        if (!errors.isValid()) {
            currentUser.reject();
            Ext.Msg.alert('Wait!', errors.getByField('name')[0].message, Ext.emptyFn);
            return;
        }


        // save user profile to data store
        var store = this.getStore('App.store.MyProfile');
        if (null == store.findRecord('id', currentUser.data.id)) {
            store.add(currentUser);
        } else {
            currentUser.setDirty();
        }
Almost the same code running in Sencha Touch 1.1 has no problem. But failed at Sencha Touch 2. The error message is:

Uncaught TypeError: Cannot call method 'create' of undefined

It's either in this.profileView.updateRecord(currentUser); or store.add(currentUser);. I checked the store and currentUser, they seems to be correct. What could be wrong? (My store's autoSync is set to true, so I think I don't need to call store.sync() after the store.add())

Thanks