Backup error - Pls help

Hi,

I have 2 versions of Postgres server 7.2 & 7.3.4 installed on Linux server 7.3. I have not started the Postgres Server 7.2 which is located at /var/library/pgsql.

I am running and using only 7.3.4 located at /usr/local/pgsql.

After I login, I come to the /usr/local/pgsql/bin and then issued the following

[usr1(at)Linuxsvr bin]$ pg_dump -h 192.168.2.51 -f /home/usr1/prod.sql prod
pg_dump: server version: pg_dump.mo; pg_dump version: 7.2.1
pg_dump: aborting because of version mismatch (Use the -i option to proceed anyway.)
[usr1(at)Linuxsvr bin]$ pg_dump -h 192.168.2.51 -i -f /home/usr1/prod.sql prod

pg_dump: server version: pg_dump.mo; pg_dump version: 7.2.1
pg_dump: proceeding despite version mismatch
pg_dump: query to obtain list of data types failed: ERROR: Attribute "typprtlen" not foun
d
[usr1(at)Linuxsvr bin]$

Where i am doing mistake. Pls shed some light.

Thank you very much.

Kumar