The length of the Cat5 Ethernet Cable from the modem to the wan port on the wireless router must not excess 90 meters max.
Once you have connected the modem to the wireless router you have to setup the router to access the broadband modem
Connect a second Ethernet cable from port 1 on the router to the Lan port on the PC
Check the following areas on the pc is correct
Web Browser Settings
Internet Explorer 4.0 or Higher
Start IE web browser. Select “Tools” then “Internet Options”- “Connection Tab”
In the “Connection” screen, there are three selections:
“Never dial a connection”,
“Dial whenever a network connection is not present”
“Always dial my default connection”.
If you can make a selection, select “Never dial a connection”.
If you cannot make a selection, select “LAN Settings”
Make sure there are no check marks next to any of the displayed Options:
“Automatically detect settings”,
“Use automatic configuration script”
“Use a proxy server”.
Click “OK”. Then click “OK” again in the “Internet Options” page.