can't log in from foreign host

Hi there,

I can't log into a postgres server from a foreign host.
PG_Version: 6.1
I have made the apropriate entries in pg_hba.conf
(even tried: "host all 0.0.0.0 0.0.0.0 trust)

here's the error msg:
Connection to database 'ks' failed.
Failed to authenticate client as Postgres user 'tony' using <unknown
authentication type>: be_recvauth: unrecognized message type: 65536

What am I missing?

Any help appreciated,
regards, Tony