Data Fields on Edge 1000 cannot be used in map page?

I developed my first custom data field today for the Edge 1000. Works well but I cannot use it on the map page. It can be used an all pages excepts for the map one. When I click on one of the fields to customize, the list of categories does not present "ConnectIQ". Can someone tell me if I've done something wrong or if it is a limitation of the Data Fields on the Edge?

Thanks,
Camillo