VPN problem with 12.04

[Chris Davis]

I would like to set up a VPN connection to my work so I can use my 
Ubuntu desktop at home to get some work done.  I am no rookie to setting 
up VPN connections, but this one is eluding me.  I seem to have it all 
set up properly, but all traffic I try to send to work is trying to go 
to the internet.  At least that is what tracepath is trying to tell me.

What I've done.
Network configuration set up a VPN connection.  Under the IPv4 tab I 
named it.  Set to Automatic(VPN) I pressed the routes button and told it 
only to use the connection for services on that particular network.

Under the VPN tab I set the gateway to the other end's DNS name and set 
my userid and Domain.  I made it available to all users.  Under the 
advanced button MSCHAP and MS-CHAP2 are checked.  And under security and 
compression all are checked except Allow stateful encryption.

Under Echo the send ppp echo packets is unchecked.

Any ideas why I can't get this working?

It connects, I just don't get anything traveling down the tunnel. I was 
assuming it would get the right gateway address from the VPN server on 
the other side.

Any ideas gratefully appreciated.
Chris