Unable to access Crypto Stick with gpg2

[Jan Ignatius]

Hello,

so far I've been (successfully) using gpg2 with Windows but having
recently installed Linux Mint 14 on a spare laptop, I've ran into
problems when trying to access my keys stored on a GPF Cryto Stick:

$ gpg2 --version
gpg (GnuPG) 2.0.19
libgcrypt 1.5.0
<snip>

$ gpg2 --card-status
gpg: selecting openpgp failed: Unsupported certificate
gpg: OpenPGP card not available: Unsupported certificate


the card contains normal 2048bit keys. If I sudo I get this:

$ sudo gpg2 --card-status
gpg: WARNING: unsafe ownership on configuration file
`/home/jan/.gnupg/gpg.conf' scdaemon[2740]: PC/SC OPEN failed: reader
unavailable gpg: selecting openpgp failed: Card error
gpg: OpenPGP card not available: Card error
$ scdaemon[2740]: PC/SC OPEN failed: reader unavailable
scdaemon[2740]: PC/SC OPEN failed: reader unavailable
scdaemon[2740]: scdaemon (GnuPG) 2.0.19 stopped


What should I try next to get gpg2 working?
-- 
Jan <email at janignatius.fi>
PGP Key: https://janignatius.fi/pgp
PGP Key Fingerprint: 08EC 7FDC BAAA EEF5 AFE8  BEEC 8B71 471F 7F86 1262