VPN ERROR - PROTOCOL ID 0

Suddenly one day the vpn stop working. I get this error when trying to
connect to my VPN through cisco client software:

80     12:50:10.998  07/07/05  Sev=Warning/3 IKE/0xA300004B
Received a NOTIFY message with an invalid protocol id (0)

The configuration is:


floodguard enable
sysopt connection permit-ipsec
sysopt connection permit-pptp
crypto map mymap client authentication LOCAL
crypto map mymap interface outside
isakmp enable outside
isakmp identity address
isakmp policy 10 authentication pre-share
isakmp policy 10 encryption des
isakmp policy 10 hash md5
isakmp policy 10 group 2
isakmp policy 10 lifetime 86400
vpngroup vpn_users address-pool vpn_ip
vpngroup vpn_users split-tunnel vpn
vpngroup vpn_users idle-time 300
vpngroup vpn_users max-time 31536000
vpngroup vpn_users password *******
vpdn group vpn_users_ms accept dialin pptp
vpdn group vpn_users_ms ppp authentication mschap
vpdn group vpn_users_ms ppp encryption mppe 40 required
vpdn group vpn_users_ms client configuration address local vpn_ms
vpdn group vpn_users_ms pptp echo 300
vpdn group vpn_users_ms client authentication local

vpdn enable outside

I already tried to reload de cisco pix 515, and also to clear "clear ipsec
sa" and "clear isakmp sa", but still I cannot connect using the cisco client
(version 4.6.00.0045). I would appreciate any help. Thanks.



Eduardo Di Monte