PITR restore hot standby

hello,

I am trying to setup a "hot standby" on a second machine.
I have created a "recovery.conf" file and started a restore with logs
from the primary machine. everything was OK.

now a have new transaction logs generated by the primary machine and I
want to "play" them on the secondary one. I have stopped postgres,
recreated "recovery.conf", started postgres and I get the following error:

----------------------------------------------------------------
LOG: database system was shut down at 2005-05-23 05:19:34 PDT
LOG: starting archive recovery
LOG: restore_command = "/usr/cbmp/core/bin/restore_pg_tlog %f %p"
LOG: restored log file "0000000100000008000000C4" from archive
LOG: invalid resource manager ID 53 at 8/C4FFFEF8
LOG: invalid primary checkpoint record
LOG: restored log file "0000000100000008000000C4" from archive
LOG: invalid resource manager ID 52 at 8/C4FFFEBC
LOG: invalid secondary checkpoint record
PANIC: could not locate a valid checkpoint record
LOG: startup process (PID 18297) was terminated by signal 6
LOG: aborting startup due to startup process failure
LOG: logger shutting down
----------------------------------------------------------------

what is the procedure for creating a "hot standby" (continuously feeding
a series of WAL files created by the primary machine into the secondary
one) ?

thanks,
Razvan Radu