I have installed
network-manager-vpnc, but when using
network-manager to add a vpn connection, the Cisco compatible is not available, only ptpp.
If that does not work you may need to be part of an group that allows you to create and connect to VPNS. If you are already an administrator of the computer, try adding yourself to other groups that have to do with networking related permissions.
dialout,netdev or proxy. Although I don't see a specific VPN group, if you have a VPN group then I would assume that one to be it.