[Enigmail] OpenPGP Card: fundamental problems

[Stefan X]

Hi!
I am testing my new OpenPGP Card but unfortunately experiencing a
fundamental problem with Enigmail.

I have two accounts and two email addresses A and B and using Enigmail
on both. Account B is set up with the OpenPGP Card. Sending an encypted
(but unsigned) Email from B (OpenPGP Card) to A works without a problem.
Sending an encrypted Email from A to B (OpenPGP Card), decrypting the
message with Enigmail fails:

"Error - secret key needed to decrypt message
No SmartCard could not be found in your reader"

So I save the email and decrypt it with "gpg -d mail.eml" which works
without any problem. The message is encrypted with the third subkey of
the card. For me it seems that Enigmail is expecting a card with the ID
bound to the email address but this is NOT the encryption key. Because
of this Enigmail may think the available smart card is not the required one.

Also I experiencing a similar problem when trying to sign a message with
the OpenPGP Card.

I set up account B from scratch, generated new keys on the card and I am
pretty sure I did no mistake. Any idea what is wrong and how to correct
it? I really appreciate any help!

Regards
Stefan