problem solved !
the card was bad. Yesterday I have formated the original card and it looks good in laptop.
I have no other card at home, but this time I have an idea that I have an other device at home.
It has some other plroblems, and there is an a card in it. So I changed the cards, and it works!!
Thank you very much for your help and your time.
Last question. Can I sand you back the other device? Last year we had some letter cahnging about it.
When that device went wrong I bought an other one because it was summer, I have to use that.
First time that device does not handle the extender board.
This time I cannot switch it on.
best regards feri