Sencha Touch 2 app doesn't show google map on Samsung Galaxy Ace
===

I've written an app which shows current location on map.
The problem is that it works on Galaxy Tab 10.1, HTC Desire, Desire Z, Galaxy S
BUT when I use Samsung Galaxy Ace or emulator with Android 2.3.3 it doesn't work - t shows me just grey screen.

Code:


    Ext.define('Proama.view.WhereAmI', {
	extend: 'Ext.Container',
	xtype: 'whereAmI',

	config: {
		layout: 'fit',
		scrollable: true,
		styleHtmlContent: true,
		style: 'text-align: center; background-color:white;',
		
		items: 
		[
			{
				xtype: 'toolbar',
				docked: 'top',
				title: 'Where am I?',
				items: [
					{
						ui: 'back',
						xtype: 'button',
						id: 'back',
						text: 'Back'
					}
				]		
			},
			{
				xtype: 'mapview'
			}
		]
	}
    });


mapview:

	Ext.define("Proama.view.MapView", {
		extend: "Ext.Map",
		xtype: 'mapview',
		config: {
			useCurrentLocation: true,
			mapOptions:{
				zoom: 14,
			},
			listeners: {
				maprender : function(comp, map){
					new google.maps.Marker({
						position: new google.maps.LatLng(this._geo.getLatitude(), this._geo.getLongitude()),
						map: map
					});					
				},
			}
		},
	})


and of course in index.html:

	<script type="text/javascript" src="http://maps.google.com/maps/api/js?sensor=true"></script>

Is it possible to make it works?
