I have two services ArcGISTiledMapServiceLayer; a service country and services province; service country cached at scale 1000000 to 15000000; services province cached at scale 2000 to 1000000, how to when i zoom map at scale 5000000, then services province overlay service country. (i cannot cache service country at scale(2000 to 15000000) because the number of tile images too much and too long time, and my server does not allow this.). thank you so much!!