Communication problem Mapsource/Basecamp

Hello,

I have the following problem with my Garmin Edge 800.
In Mapsource and Basecamp the Garmin Edge is not recognized. It's not possible to download waypoints and maps.
The mass storage corrects good, there is a drive letter.
I tried a second cable and also I try it on a second PC. Both PC's with Windows 10.
I have also made a factory reset from the Edge.

Please suggestions for this problem because next week I go on holiday and I want to download new maps and routes.


Arjan