Question : cisco vpn setup error

Hi Im new to cisco and have cisco 857 router
have connected to internet and setup nat and vpn using the SDM interface.

When I try to connect the to VPN externally prompts for username and password  and get this error on the cisco VPN Client
Cisco Systems VPN Client Version 5.0.04.0300
Copyright (C) 1998-2007 Cisco Systems, Inc. All Rights Reserved.
Client Type(s): Windows, WinNT
Running on: 6.1.7600

17     20:37:20.391  07/27/10  Sev=Warning/2      IKE/0xE3000023
No private IP address was assigned by the peer

18     20:37:20.391  07/27/10  Sev=Warning/2      IKE/0xE300009B
Failed to process ModeCfg Reply (NavigatorTM:175)

Answer : cisco vpn setup error

Looks like maybe a typo here:

crypto isakmp client configuration group xxxvpn
 key xxxxx
 dns 172.168.100.1  <=== should be 192.168.100.1
 domain xxxxxx