Hi Hartmut,
Suggest using CSSC with CTA.
CTA 802.1x supplicant have limitation.
CSSC is free for basic features, advanced features (support wireless) need license.
You may need to un-install CTA with 802.1x supplicant first, follow by install CSSC + CTA (without 802.1x) because CSSC have built-in 802.1x features.
Please take note of the installation sequence. Because if you make mistake about the installation sequence, you may get a error and the thing didn't work.
Hope this help
Thanks