upgrade FW to 2.1.1 (Wiser for KNX)

[Mr.D]

As I wrote above. Press reset button. For 10 seconds. Led will start flashing red.

Have tried that now, but still not able to get contact.
When putting the old card back in I get access again...

Is there a config or something that is not being backed up... I put the new SD card back in, and the access disappears.