troubles with postgresql 7.0.2

After working a while with postgresql 7.0.2 from redhat 7.0, with upgrates
at glibc 2.2.2 and a few other improvements, i have kernel 2.2.17 from rh
7.0 updates.
And today my postmaster died with :

The Postmaster has informed me that some other backend died abnormally and
possibly corrupted shared memory.
        I have rolled back the current transaction and am going to
terminate your database system connection and exit.

and i wasn't able to start again.

/usr/bin/postmaster: reaping dead processes...
/usr/bin/postmaster: CleanupProc: pid 1483 exited with status 139
Server process (pid 1483) exited with status 139 at Thu May  3 10:29:59
2001
Terminating any active server processes...
Server processes were terminated at Thu May  3 10:29:59 2001
Reinitializing shared memory and semaphores
010503.10:29:59.379  [1477] shmem_exit(0)
binding ShmemCreate(key=52e389, size=1104896)
010503.10:29:59.595  [1484] DEBUG:  Data Base System is starting up at Thu
May
3 10:29:59 2001
010503.10:29:59.596  [1484] DEBUG:  Data Base System was interrupted being
in production at Thu May  3 10:25:58 2001
010503.10:29:59.599  [1484] DEBUG:  Data Base System is in production
state at Thu May  3 10:29:59 2001
010503.10:29:59.599  [1484] proc_exit(0)
010503.10:29:59.600  [1484] shmem_exit(0)
010503.10:29:59.600  [1484] exit(0)
/usr/bin/postmaster: reaping dead processes...

this is the error message now, and i have no idee how can i resolv this.
i use /usr/bin/pg_ctl -o "-i -d 5" -D /[datadir] start &

Diana Cionoiu