Unsupported option "GSSAPIAuthentication"

Hello,

On Solaris 8 and 10, when I set the configuration option
GSSAPIAuthentication to yes (either in ssh_config or in command line),
I see unsupported option error. Could somebody point out where the
problem could be?

Here are SSH versions on these machines:

dev3:~ amptest$
dev3:~ devuser$ klist
Ticket cache: /tmp/krb5cc_107
Default principal: devuser@xxxxxxxxx

Valid starting Expires
Service principal
Mon Dec 17 12:50:57 2007 Mon Dec 17 22:50:57 2007 krbtgt/
ROKDC.COM@xxxxxxxxx
dev3:~ amptest$
dev3:~ devuser$ echo $KRB5CCNAME
/tmp/krb5cc_107
dev3:~ amptest$
dev3:~ devuser$ ssh -v -o "GSSAPIAuthentication=yes" dev7.mydomain.com
OpenSSH_3.9p1, OpenSSL 0.9.7e 25 Oct 2004
command-line line 0: Unsupported option "GSSAPIAuthentication"
..
..
..
debug1: Host 'dev7.mydomain.com' is known and matches the RSA host
key.
debug1: Found key in /export/home/devuser/.ssh/known_hosts:23
debug1: ssh_rsa_verify: signature correct
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug1: SSH2_MSG_NEWKEYS received
debug1: SSH2_MSG_SERVICE_REQUEST sent
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug1: Authentications that can continue: publickey,gssapi-with-
mic,password
debug1: Next authentication method: publickey
debug1: Trying private key: /export/home/amptest/.ssh/identity
debug1: Trying private key: /export/home/amptest/.ssh/id_rsa
debug1: Trying private key: /export/home/amptest/.ssh/id_dsa
debug1: Next authentication method: password
devuser@xxxxxxxxxxxxxxxxx's password:
.