[VPN] debug string of isakmp

[Alberto Pesce]

Hello to everybody!
I have a problem: I'm trying to debug a VPN on CISCO PIX501

After the ping made by a host on the network of PIX 501 I get what follows:
How can I interpret them?

debug crypto isakmp
.....
ISAKMP: unsupported proxy id type IPV4_ADDR_RANGE
ISAKMP: IPSec policy invalidated proposal
ISAKMP (0): SA not acceptable!
ISAKMP (0): sending NOTIFY message 14 protocol 3
return status is IKMP_ERR_NO_RETRANS
crypto_isakmp_process_block: src A.xxx.xxx.xxx, dest B.xxx.xxx.xxx
ISAKMP (0): processing DELETE payload. message ID = 2276755429
ISAKMP (0): deleting SA: src B.xxx.xxx.xxx, dst A.xxx.xxx.xxx
return status is IKMP_NO_ERR_NO_TRANS
ISADB: reaper checking SA 0x80948730, conn_id = 0  DELETE IT!

I hope I have given to you all the informations in order to let you help me.
I wait for your suggestions,

Thank You