Racoon: pfkey UPDATE failed: No such file or directory -- Please help

Hi,

I got this message on one freebsd (6.2) system, while another (remote)
freebsd 6.2 system has no this error. This 2 systems are configure
with IPSEC enabled.

Here is the debugging message:
2007-08-29 23:38:21: DEBUG: hmac(hmac_sha1)
2007-08-29 23:38:21: DEBUG: encryption(3des)
2007-08-29 23:38:21: DEBUG: hmac(hmac_sha1)
2007-08-29 23:38:21: DEBUG: encklen=192 authklen=160
2007-08-29 23:38:21: DEBUG: generating 640 bits of key (dupkeymat=4)
2007-08-29 23:38:21: DEBUG: generating K1...K4 for KEYMAT.
2007-08-29 23:38:21: DEBUG: hmac(hmac_sha1)
2007-08-29 23:38:21: DEBUG: hmac(hmac_sha1)
2007-08-29 23:38:21: DEBUG: hmac(hmac_sha1)
2007-08-29 23:38:21: DEBUG:
d2121274 c257362c cc430e68 48184574 50d20c67 941418c0 103ebfd8 10618c48
81979313 e47a5eaf dec87b93 f43301ab 864c0733 5443017c 70fe32d5 175e3a42
0e10e304 8d76672f 97e7df12 c5295305
2007-08-29 23:38:21: DEBUG: KEYMAT computed.
2007-08-29 23:38:21: DEBUG: call pk_sendupdate
2007-08-29 23:38:21: DEBUG: encryption(3des)
2007-08-29 23:38:21: DEBUG: hmac(hmac_sha1)
2007-08-29 23:38:21: DEBUG: call pfkey_send_update
2007-08-29 23:38:21: DEBUG: pfkey update sent.
2007-08-29 23:38:21: DEBUG: encryption(3des)
2007-08-29 23:38:21: DEBUG: hmac(hmac_sha1)
2007-08-29 23:38:21: DEBUG: call pfkey_send_add
2007-08-29 23:38:21: DEBUG: pfkey add sent.
2007-08-29 23:38:21: DEBUG: get pfkey UPDATE message
2007-08-29 23:38:21: ERROR: pfkey UPDATE failed: No such file or directory
2007-08-29 23:38:21: DEBUG: get pfkey ADD message
2007-08-29 23:38:21: INFO: IPsec-SA established: ESP
freebsd2[0]->freebsd1[0] spi=178453273(0xaa2fb19)
2007-08-29 23:38:21: DEBUG: ===
2007-08-29 23:38:25: DEBUG: get pfkey REGISTER message
2007-08-29 23:38:25: INFO: unsupported PF_KEY message REGISTER
2007-08-29 23:38:25: DEBUG: get pfkey REGISTER message
2007-08-29 23:38:25: INFO: unsupported PF_KEY message REGISTER
2007-08-29 23:38:25: DEBUG: get pfkey REGISTER message
2007-08-29 23:38:25: INFO: unsupported PF_KEY message REGISTER
2007-08-29 23:38:51: ERROR: freebsd1 give up to get IPsec-SA due to
time up to wait.
2007-08-29 23:39:10: DEBUG: get pfkey REGISTER message
2007-08-29 23:39:10: INFO: unsupported PF_KEY message REGISTER
2007-08-29 23:39:10: DEBUG: get pfkey REGISTER message
2007-08-29 23:39:10: INFO: unsupported PF_KEY message REGISTER
2007-08-29 23:39:10: DEBUG: get pfkey REGISTER message
2007-08-29 23:39:10: INFO: unsupported PF_KEY message REGISTER
2007-08-29 23:39:58: DEBUG: get pfkey EXPIRE message
2007-08-29 23:39:58: INFO: IPsec-SA expired: ESP
freebsd2[0]->freebsd1[0] spi=178453273(0xaa2fb19)
2007-08-29 23:39:58: DEBUG: no such a SA found: ESP
freebsd2[0]->freebsd1[0] spi=178453273(0xaa2fb19)
2007-08-29 23:40:20: INFO: ISAKMP-SA expired
freebsd2[500]-freebsd1[500] spi:3d942994c72fdc06:597e055db227b31c
2007-08-29 23:40:21: INFO: ISAKMP-SA deleted
freebsd2[500]-freebsd1[500] spi:3d942994c72fdc06:597e055db227b31c

Your help is much appreciated.

Thanks
Sam
.