When we upgraded to Windows 7 we found that our laptops would not connect to our VPN over 3G Datacards using the Cisco VPN Client.
This is due to the Cisco VPN Client software not supporting WWAN devices. Initially we were stunned to learn that the latest VPN Client wasn’ compatible with Windows 7! Subsequently they did release a version – we currently use version: 5.0.07.0440. But at the same time they announced that the VPN Client was end of life and that you should be using the AnyConnect client instead (that’s a whole different story see: http://www.islandearth.com/articles/2013/5/2/cisco-asa-anyconnect-vpn-per-device-ipsecv2-tunnels-using-ce.html)
This meant that WWAN was never going to be supported in the Cisco VPN Client and we could not upgrade to AnyConnect VPN due to our reliance on IPSECv1 VPN Tunnels (see article above).
After much searching we managed to find a solution:
The problem is apparently to do with a limit on Citrix DNE instrumentation measuring! Quite how this makes the VPN Client work with WWAN cards is beyond me but it does!