Two Gateways

I have a VPN Connectivity between Office 1 and office 2. Each office has separate internet connection.

Office 1 has a router based Internet connection and Office 2 has USB DSL Connection connected to Server.

Office 1 VPN IP Address starts from 10.200.115.3 and ends at 10.200.115.9, subnet mask is 255.255.255.0 and default gateway is 10.200.115.100

Office 2 VPN IP address starts from 192.168.115.3 and ends at 192.168.115.9 , subnet mask is 255.255.255.0 and default gateway is 192.168.115.2.

By entering the above details I am able to establish VPN connection between two offices. However in Office 2 Internet is only a USB/DSL connection connected to Server i.e. 192.168.115.3 and the internet is shared by usual Windows XP sharing. But I am unable to access interenet and share Internet over the network of office 2. Even if i give additional gateway of the server Ip address in all other machines it is not able to access internet. If I replace the VPN gateway with the Server IP address as default then the Internet sharing works but VPN does not work.

Please advise how do I resolve this issue. Also is there any way I can have both the gateways accessing simultaneously to access both VPN and Internet.

Regards
Ranjeeth
dranjeeth@gmail.com