Maybe this will help you.
http://www.usrobotics.com/support/s-networking/s-networking-docs/online-manual/con figure.htm
Sounds like u have to setup the Virtual Server on your router.
Virtual Server:
The broadband router's NAT (Network Address Translation) firewall filters out unrecognized packets to protect your intranet. All hosts behind this firewall are invisible externally. Enabling the Virtual Server Mapping will make some of the host's ports accessible.
A virtual server is defined as a Service Port. All requests to this port will be redirected to the PC that is specified by the Server IP.
Port forwarding sets up public services on your network. When Internet users make requests on your network, the broadband router will forward those requests to the appropriate computer. The broadband router's DHCP function must be disabled to use port forwarding. Port forwarding is generally used to set up a webserver, ftp server, or e-mail server on your network.
To add a server using Forwarding, perform the following steps:
Enter the port number and the IP Address of the server that you want to allow Internet users to access.
Configure as many entries as desired until all the entries are filled in.
Click Apply in order to save the settings.
For example, if you have an FTP server (port 21) at 192.168.123.1, a Web server (port 80) at 192.168.123.2, and a PPTP VPN server at 192.168.123.6, you need to specify the following virtual server mapping table:
Service Port Server IP Enable
20 --------- 192.168.123.1 V
21 --------- 192.168.123.1 V
80 --------- 192.168.123.2 V
1723 ------- 192.168.123.6 V
[ August 21, 2001 11:20 AM: Last edited by VP ]