Hi @favbabs ,
Have you checked that you are inserting it the correct way?
Make sure that the card label (card maker’s name etc) is facing the battery when inserting.
Here’s an image from the [https://gdlp01.c-wss.com/gds/4/0900001304/01/PSPro1CUG-EN.pdf|user manual]
[image|2239377]
(click on image to enlarge for better viewing)