mifare-tool

[Kn1ght L0rd]

I am trying to work with the mifare-tool included in the librfid utilities
and I am having a problem.  I can read sectors with it fine but when I try
to write a sector I get an error.  I am using the OpenPCD mifare-classic
cards to write to.  Here is my output.

kn1ghtl0rd at david-linux:~/librfid/utils> sudo ./mifare-tool -w 1 12 34
lt-mifare-tool - (C) 2006 by Harald Welte
This program is Free Software and has ABSOLUTELY NO WARRANTY

initializing librfid
opening reader handle
No Omnikey Cardman 5121 found
write(key=' ff ff ff ff ff ff',page=1): ' 12'(1):opening layer2 handle
running layer2 anticol
ISO14443-3A anticollision succeeded
running layer3 (ats)
we now have layer3 up and running
Mifare card available
mifare auth succeeded!

error during write

Can anyone help me out?  Thanks.

David
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