[exim] Help with Smarthost config using Yahoo

I have been looking aound the internet all day and can't seem to get
the smarthost feature of exim4 working with SBC Yahoo's mail server.
Everytime I send an message to a internet address I received a
message that says:

SMTP error from remoe mailer after MAIL FROM:<ron@localhost>:
host smtp-sbc-v1.mail.vip.sc5.yahoo.com [66.163.171.137]:
530 authentication required

I have set the configuration as follows. What am I doing wrong. The
documentation says that this should be easy....

Thanks in advance for any help.



# /etc/exim4/update-exim4.conf.conf
#
# Edit this file and /etc/mailname by hand and execute update-
exim4.conf
# yourself or use 'dpkg-reconfigure exim4-config'

dc_eximconfig_configtype='smarthost'
dc_other_hostnames='localhost.localdomain'
dc_local_interfaces='127.0.0.1'
dc_readhost=''
dc_relay_domains=''
dc_minimaldns='false'
dc_relay_nets=''
dc_smarthost='smtp.sbcglobal.yahoo.com'
CFILEMODE='644'
dc_use_split_config='false'
dc_hide_mailname='false'
dc_mailname_in_oh='true'

### CONFDIR/passwd.client
#
# Format:
#targetmailserver.example:login:password
smtp.sbcglobal.yahoo.com:myyahooid:myyahoopassword
#
# default entry:
### *:bar:foo