Hi, I'm having a problem with the cards on the Forerunner 945, I bought the watch a few weeks ago and on my first runs the maps worked just fine. Then I updated the maps (first time i connected the watch with garmin express) and since then no more maps appear on the device. When I run a route there is only the line that shows me the way but no map in the background. I have already tried twice to reinstall the maps via Garmin Express without success. Any ideas what else I could do?