Importing old PGP key

[Kiss Gabor (Bitman)]

I have the same problem as was answered by David Shaw in 2004:
http://osdir.com/ml/gnu.gnupg.users/2004-06/msg00022.html
(Converting a veeeery old PGP key (2.6.3ia) to GnuPG.)

However the method he suggested does not work for me:


$ gpg --s2k-cipher-algo cast5 --edit-key 0x5D144299
gpg (GnuPG) 1.4.6; Copyright (C) 2006 Free Software Foundation, Inc.
This program comes with ABSOLUTELY NO WARRANTY.
This is free software, and you are welcome to redistribute it
under certain conditions. See the file COPYING for details.

Secret key is available.

pub   512R/5D144299  created: 1999-04-12  expires: never       usage:
SCEA
                     trust: unknown       validity: unknown
[ unknown] (1). hun.admin.news

Command> passwd
Key is protected.
gpg: protection algorithm 1 (IDEA) is not supported
gpg: the IDEA cipher plugin is not present
gpg: please see http://www.gnupg.org/faq/why-not-idea.html for more information
Can't edit this key: unknown cipher algorithm

Command> 


What should I do?

Gabor