HELP! Cannot access table!!!!

Hello,

I have a big problem when I try to access a table.
When I do:

ux5_billing=# SELECT COUNT(*) FROM billing;

I get the output:

FATAL 2: open of /pgdata//pg_clog/0FF0 failed: No such file or directory
FATAL 2: open of /pgdata//pg_clog/0FF0 failed: No such file or directory
server closed the connection unexpectedly
This probably means the server terminated abnormally
before or while processing the request.
The connection to the server was lost. Attempting reset: DEBUG: server
process (pid 325) exited with exit code 2
DEBUG: terminating any other active server processes
NOTICE: Message from PostgreSQL backend:
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.
Please reconnect to the database system and repeat your query.
NOTICE: Message from PostgreSQL backend:
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.
Please reconnect to the database system and repeat your query.
NOTICE: Message from PostgreSQL backend:
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.
Please reconnect to the database system and repeat your query.
DEBUG: all server processes terminated; reinitializing shared memory
and semaphores
Failed.
!# DEBUG: database system was interrupted at 2002-06-07 15:16:42 CEST
DEBUG: checkpoint record is at 0/2863DF58
DEBUG: redo record is at 0/2863DF58; undo record is at 0/0; shutdown FALSE
DEBUG: next transaction id: 1353431; next oid: 1443677
DEBUG: database system was not properly shut down; automatic recovery
in progress
DEBUG: ReadRecord: record with zero length at 0/2863DF98
DEBUG: redo is not required
DEBUG: database system is ready

I Use the latest version 7.2.1, running on a HP-9000 with Debian.
Indeed, the file /pgdata//pg_clog/0FF0 doesn't exist!

Is it normal that there are 2 backslashes in /pgdata//pg_clog/0FF0 ?

Does anyone of you know what's going on?

Thanx!

Wim