Sencha Touch: XTemplate not visible in DataView
===

I'm a newbie to all the Sencha Touch stuff, but until now I'm very enthousiastic about it's capabilities. There is one problem, i somehow can't solve. 

I would like to use a Tpl (XTemplate) for a calender view. The idea is to create a div element for every appointment, which i can place within <div> containers to layout them. Somehow i can't get the dataview to work. 

I've stripped down my code to the bare minimum: a panel containing a DataView. When i use the itemTpl, everything works fine. But when I use the tpl (with or without the XTemplate) i don't see anything. I checked if it was just a display malfunction (searched for the XXX from the template), but that's not the case. 

This is my code:

    Ext.define('InfoApp.view.CalendarDay', {
	extend: 'Ext.Panel',
	xtype: 'calendarday',
	requires: [ 'InfoApp.store.sAppointments'],
	config: {
		title: 'Dag',
		layout: 'fit',
			items: [
			        {
			        	xtype: 'dataview',
			        	store: 'appointmentStore',
			        	
			        	//itemTpl: [ 'XXX {day} {course}' ] --> Works
			        	tpl: new Ext.XTemplate('<tpl for=".">XXX {day} {course}</tpl>')--> Doesn't Work... 
			        }        
		    ]
	}
    });

Thanks in advance for any suggestions or improvements!