Problem with ssh through a VPN internet client

Hi,
I have an obstacle to login remotely to my server. When I used DHCP internet connection, I simply worked with the ssh (scp) commands without any problem. Now, however, I need to use the VPN client to access to internet. After I log on by VPN, I can use the Firefox browser, but the ssh (scp) commands do not work at all from the command prompt. It looks that ssh does not go through the VPN client. I have tried putty.exe with wine, but that also does not work.
Could anyone help?

Please compare the output of this command before and after connecting to the VPN :

/sbin/route -n

Best regards,
Greg