How can i setup a network between my dubai to cochin offices, with on time data backup to cochin.?

I am trying to backup offices over a VPN?

I am running Windows SBS 2003. I have a good link once connecting my VPN. I am able to remote desktop to both end points.
Then I try to Back up through the Server Management tool. When I try to choose back up destination, I am able to view the end point network icon, but [...]