[ubuntu] PPTP VPN connects via NM but goes down during SSH connection

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http://ubuntuforums.org – Hello, I setup a VPN PPTP connection via network manager and it connects correctly (I see the lock near the notification icon and the message "Vpn connection has been successfully...") As soon as I try to perform any SSH connection via the established tunnel the connection itself goes down with the message "Vpn connection failed". the SSH connection always fails at Code: debug1: SSH2_MSG_KEXINIT sent I've looked into the system logs and this is the log Code: Dec 12 12:25:00 ushuaia NetworkManager[1155]: <info> Starting VPN service 'pptp'... D (Hardware)