Creating a VPN with network connection wizard

[Mark Ryden]

Hello,
  I try to connect to a VPN using the network connection wizard of Feodra 12.
(System->Preference->Network Connections).
I select the "VPN" tab.
I press "Add" and choose PPTP.
I enter what is needed and created a VPN connection named VPN1.
I press apply when finished and everything is OK. The dialog is closed.
Now how can I activate this VPN connection ?

Rgs,
  Mark