Fatal 2: control file context is broken

I am runnning postgres 7.1.3 on RH 7.2. I am using Lyris Listmanager
6.1
I have been running this way for 2 years - no problems!
Today postgres quit. I am unable to start postgres. I receive this
error:
[postgres(at)listman bin]$ ./pg_ctl start
[postgres(at)listman bin]$ FATAL 2: control file context is broken
./postmaster: Startup proc 1816 exited with status 512 - abort

I have not been able to find anything in the logs. Because I have not
had any problems I don't even know where to begin looking. If this is
the wrong list, please point me to the correct one. I am looking for
help. Is there a shop out there that support Postgres?

Thanks

=============================
Michael Brytowski - MAPPCOR
IT Specialist
651-632-8446