File Sharing from Client to SBS2003 Problem

My problem is that I am unable to access any shared directories or printers
from my Sever to my work stations that are connected through a VPN Tunnel.
The VPN Tunnel is setup through LinkSys Routers and are established and are
working.

Here is the setup:

SBS2003
Local IP: 192.168.1.10
Subnet: 255.255.255.0
Gateway: 192.168.1.10

Remote Client#1
Local IP: 192.168.2.100 (DHCP)
Subnet: 255.255.255.0
Gateway: 192.168.3.1 (LinkSys Router)

Remote Clients #2-3 are the same setup but different Subnets.

>From the Remote Locations, I am able to access the Shared Files/Printers on
the SBS2003.

But, from the SBS2003 Server Location, I can't access the remote (computers)
locations Shared/Files and Printers. I am able to access the local Clients
at the same location at the SBS2003 Server. (Same Subnet)
.