NFS mount USB smartcard?

bihon

Hello,

Unfortunately my 600pvr comes without usb connection, so I would like to insert my usb smartcard reader (smargo) into a PC on the same lan and connect it to the receiver. Up to now I have established nfs connection, exporting /dev directory from PC and successfully mounted it into /dev/smart/ in the DB, however /dev/smart/ttyUSB0 is not recognized as a smartcard; Entitlements message says:
card reader /dev/smart/ttyUSB0
no or unknown card inserted

It works correctly in the PC.


PC:
/etc/exports:
/dev 192.168.1.7(rw,async,no_root_squash,fsid=5)

mount command in dreambox:
mount -t nfs -O rw,soft 192.168.1.8:/dev /dev/smart

Any ideas?