Problem in running the postmaster

hi,

I have installed the latest version 0f PostgreSQL on a Linux system.
Also created a database. But now when I try to execute th Postmaster I will
be getting the following error:

    980606.18:21:07.371 [17703] DEBUG:  Data Base System is starting up
at Sat Jun
    6 18:21:07 1998
    980606.18:21:07.371 [17703] FATAL 2:  Control file context is broken
    980606.18:21:07.371 [17703] FATAL 2:  Control file context is broken
    Startup failed - abort

and the process gets terminated.

The variables PGHOST, PGDATA, and PGPORT are set to appropriate values.

Please let me know the solution for this as soon as possible.

Thanks in advance,
With Regards,
raghavendra