Unable to change passphrase

[sansay]

Hi all,

I am completely stumped.
I can't change the passphrase on a gpg key. Here is the whole interaction:

bash-4.1$ gpg --edit-key 8267977F
gpg (GnuPG) 2.0.14; Copyright (C) 2009 Free Software Foundation, Inc.
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.

Secret key is available.

pub  2048R/8267977F  created: 2013-01-16  expires: never       usage: SC
                     trust: unknown       validity: unknown
sub  2048R/3F32FB05  created: 2013-01-16  expires: never       usage: E
[ unknown] (1). am_prod <navsrv at blackhole.sm.net>

Command> passwd
Key is protected.

You need a passphrase to unlock the secret key for
user: "am_prod <navsrv at blackhole.sm.net>"
2048-bit RSA key, ID 8267977F, created 2013-01-16

gpg: cancelled by user
Can't edit this key: General error

Command>

Thanks for your help.