error starting the server 7.3.2

I installed PostgreSQL 7.3.2 binary via Redhat 8 RPM. When I tried to start the server, I got the following error:

[postgres@lbslnx05 postgresql]$ pg_ctl start -D /opt/postgresql/data -o "-i"

postmaster successfully started

[postgres@lbslnx05 postgresql]$ FATAL:  File /opt/postgresql/data/PG_VERSION is

missing. This is not a valid data directory.

Any help will be appreciated.

Scott Ding