specified cluster does not exist error

Hi There,
I created a cluster with initdb into a custom directory /pgdata/bases, and
ser PGDATA environment to that value. I can start/stop postmaster from
command prompt.

Despite this, when I issue ./postgresql-8.1 start, cluster main is started
up instead.

Hence I modified init-d.functions line
for c in /etc/postgresql/"$2"/*; do
to
for c in /pgdata/bases/*; do

Now when I issue a startup I get the following error.

Starting PostgreSQL 8.1 database server: PERSONAL* Error: specified cluster
does not exist
 failed!

Any clues?
regards,
jm