One problem that I've seen is that the GUI does not provide for a way to import the XML file that it so readily exports.
The answer is to use the CLI. First, upload the XML file to the file system in the GUI under file management and remember the name you used. Then connect to the device via serial or some other manner:
Welcome toCisco SystemsVPN 3000 Concentrator SeriesCommand Line InterfaceCopyright (C) 1998-2005 Cisco Systems, Inc.1) Configuration2) Administration3) Monitoring4) Save changes to Config file5) Help Information6) Exit
From there, select 2, and you'll see:
Select 81) Administer Sessions2) Software Update3) System Reboot4) Reboot Status5) Ping6) Traceroute7) Access Rights8) File Management9) Certificate Management10) Back
Which File to import XML from
Put in the name of the file you copied to the system using the GUI and you'll see:
Import successful.Back out: 10 followed by 10 again, and save config. Reboot the system. You may need to re-import the XML as sometimes things like default gateways don't get set correctly on the first import.