Unable to import PGP key - (7, 9, 'No public key')

I've tried to register my PGP key 2C6FFCEB53024103F7AFDD5578C15A515A1665A1, but verification fails with: Launchpad could not verify your signature: (7, 9, 'No public key')

Here is the signed authorization:
-----BEGIN PGP SIGNED MESSAGE-----
Hash: RIPEMD160

Please register 2C6FFCEB53024103F7AFDD5578C15A515A1665A1 to the
Launchpad user bdonlan. 2007-04-15 20:48:49 UTC
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.6 (GNU/Linux)

iD8DBQFGIo/OM5lkqK8J97ERA/MCAJ4kjVXlGKlS6S0MR9cDxqEgR4OGKACfQTrN
XTvT7LMaKGAyxvUA8MNVzT0=
=T+AA
-----END PGP SIGNATURE-----

I have tried gpg --keyserver keyserver.ubuntu.com --send-key 2C6FFCEB53024103F7AFDD5578C15A515A1665A1 , but it didn't seem to help. I've also uploaded the public key at http://www.fushizen.net/2C6FFCEB53024103F7AFDD5578C15A515A1665A1.asc