The New MapKit API's in Corona

I am trying the following code and I see nothing, is there something wrong? I have the latest edition of Corona SDK.

[code]
local myMap = native.newMapView( 10, 10, 300, 200 )
myMap.mapType = “hybrid”

myMap.isZoomEnabled = true
myMap.isLocationUpdating = true
myMap.isScrollEnabled = true

myMap.addMarker ( 147,19 , { title=“Displayed”, subtitle=“Where is this?” } )
[/code] [import]uid: 3826 topic_id: 4286 reply_id: 304286[/import]