can not use lptools when ssh'ed into a system

I'd like to be able to use lptools on another system to which I am connected via ssh. This fails for me:

14:12:29 - flash:[/tmp] lp-grab-attachments 991792
Gkr-Message: couldn't connect to dbus session bus: Failed to connect to socket /tmp/dbus-4jE8zT2C7a: Connection refused
Traceback (most recent call last):
  File "/usr/bin/lp-grab-attachments", line 106, in <module>
    main()
  File "/usr/bin/lp-grab-attachments", line 70, in main
    launchpad = config.get_launchpad("grab-attachments")
  File "/usr/lib/python2.7/dist-packages/lptools/config.py", line 53, in get_launchpad
    return Launchpad.login_with("lptools-%s" % appname, instance)
  File "/usr/lib/python2.7/dist-packages/launchpadlib/launchpad.py", line 539, in login_with
    credential_save_failed, version)
  File "/usr/lib/python2.7/dist-packages/launchpadlib/launchpad.py", line 342, in _authorize_token_and_login
    authorization_engine.unique_consumer_id)
  File "/usr/lib/python2.7/dist-packages/launchpadlib/credentials.py", line 282, in load
    return self.do_load(unique_key)
  File "/usr/lib/python2.7/dist-packages/launchpadlib/credentials.py", line 336, in do_load
    'launchpadlib', unique_key)
  File "/usr/lib/python2.7/dist-packages/keyring/core.py", line 34, in get_password
    return _keyring_backend.get_password(service_name, username)
  File "/usr/lib/python2.7/dist-packages/keyring/backend.py", line 154, in get_password
    items = gnomekeyring.find_network_password_sync(username, service)
gnomekeyring.IOError