I have a problem in add pptp vpn.
I just upgrade ubuntu by sudo apt-get upgrade and the VPN PPTP stop working with the message:
The VPN Connection 'VPN Connection 1' failed because the VPN service failed to start
apt-get install network-manager-openvpn-gnome
apt-get install network-manager-pptp
apt-get install network-manager-pptp-gnome
apt-get install network-manager-strongswan
apt-get install network-manager-vpnc
apt-get install network-manager-vpnc-gnome
/etc/init.d/network-manager restart