Can't take base back up with Postgres 9.0 on Solaris 10

Hi everyone,

I'm trying to take a base backup of my primary DB ready for copying to my
standby. I've followed the instructions to configure my postgresql.conf at
hxxp://www.postgresql.org/docs/9.0/static/continuous-archiving.html, but I
get one of two errors depending on how I try to run the backup:

bash-3.00$ bin/psql -c "SELECT pg_start_backup('basebackup', true)"
ERROR: function pg_start_backup("unknown", boolean) does not exist
HINT: No function matches the given name and argument types. You may need to
add explicit type casts.
bash-3.00$ bin/psql -c "SELECT pg_start_backup('basebackup')"
ERROR: WAL archiving is not active
HINT: archive_command must be defined before online backups can be made
safely.

Here are the lines I've changed in postgresql.conf:
listen_addresses = '*' # what IP address(es) to listen on;
port = 5555 # (change requires restart)
wal_level = archive # minimal, archive, or hot_standby
archive_mode = on # allows archiving to be done
archive_command = 'scp %p
postgres@172.18.131.211:/postgres/postgres/9.0-pgdg/primary_archive' #
command to use to archive a logfile segment
max_wal_senders = 1 # max number of walsender processes
wal_keep_segments = 32 # in logfile segments, 16MB each; 0 disables


Could anyone tell me what the problem might be?

Thanks,
Dan
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