changing pin fails on pgpg card

[Halim Sahin]

Hi Folks,

I am currently testing to setup my new card for gpg.

First I have installed pcscd and the card seems working
gpg --card-status shows some data :-).

I was able to change Name and sex but not the pin/adminpin.
Admin commands are allowed

Command> passwd
gpg: OpenPGP card no. D2760001240102000005000004750000 detected

1 - change PIN
2 - unblock PIN
3 - change Admin PIN
Q - quit

Your selection? 1

PIN

New PIN

New PIN
Error changing the PIN: invalid argument

1 - change PIN
2 - unblock PIN
3 - change Admin PIN
Q - quit

Your selection?


My cardreader is an old towitoko micro.
Any Ideas what's going wrong???
BR.
Halim