Qualified digital signature with Adobe Sign and D-Trust signature card

I have a smart Card with signature certificate from D-Trust (German provider) and a card reader from Reiner SCT, with keypad. I want to use both to sign documents via adobe sign or adobe acrobat, but in all cases the signature workflow can not continue. After selecting to use a certificate on a device connected to the computer, adobe always tells me it can not find any device. However, drivers are installed and other applications can access the card reader and certificate. What am I missing here?

Thanks

J

PS: edited to add the following info: I read in one answer to another issue that the question author would need the enterprise version of the software. We do use the enterprise version of  Adobe Sign, if that makes a difference. Several dozens of groups, hundreds of users, as far as I can see. 

Using the real deal (i.e. qualified dig sig with smart Card would be the super solution for us. But, as said, I don't get it to work. Dig Sig in 2019 (almost 2020) is still a difficult thing. So sad. 

@meenakshin83966505 .... please help 🙂