ah yes, my mistake
, I took another USB stick and the upgrade worked.
And the other problem is the age of the firmware, the old firmware (T-GAP8DEUC-1015) cannot work together with the new software of the CI+ Modul.
I've tried the new version and the CI + module has been detected.
So, I would have to downgrade the software of the CI + module to get to the success, but I think that's not possible.