Hi person,
This forum is focused in to discuss questions about PCI Compliance. By this way, post the same question in the VPN Forum (http://forum.cisco.com/eforum/servlet/NetProf?page=Virtual_Private_Networks_discussion), when i will to answer with pleasure.
At this moment, that i say to help is: verify parameter og ISAKMP, like ttl, encryption, peer, and so on. This behavior is typicaly seem in enviroments with misconfigured parameter.
At end, verify conectivity between boths peers.
Regards,
BHS.