recovery problem

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) ?