Linksys wireless router

Reset the router with the pin hole on the back,

Connect ISP modem to wireless router and then PC with cable. If that is fine you have a network. The easiest way now is to activate WPS on both devices. If this is not an option check web interface for network. Type 192.168.1.1 in web browser.

On the second router just plug a port cable in from your main routers port into the wan port and then be sure to change the second routers gateway and IP address to a different number. Say that your main router IP is 198.18.1.1 and for your second router IP you could use 10.10.10.1 or what ever combo you want and then you should be able to use both routers together. Is this what you are trying to do?
Linksys routers as well as all routers with DHCP enabled should be able to handle up to 255 separate IP address's for a LAN network. Is the firmware of the Linksys the latest? If not, down load the latest firmware and flash the router to update it. Or, check out third party firmwares like Tomato to flash that tired Linksys and turn it into a real router.

The Linksys Wireless router is fine, but your latop is not configured for DHCP (Dynamic Host Configuration Protocol). The computer is connected to the router at layer 2, whereas HTTP (Hypertext Transfer Protocol), sits
atop the TCP/IP (Transmission Control Protocol/Internet Protocol) layer, and seems to be trying to
query the ISP's (Internet Service Provider) network for a nameserver (via DNS (Dynamic Name Service) protocol) that doesn't exist on the ISP's network. Configuring the laptop for DHCP and specifying no nameserver will fix this (the ISP's network will dynamically assign a DNS).

Its also possible (though a remote possibility) that your Linksys wifi router may be configured to disallow TCP/IP virtual circuits to/from your computer's IP address - but this is a really advanced
capability of your Linksys wifi router - few know this capability even exists.

Connecting multiple wifi devices to the Linksys router should be no problem, just configure them all to interact with the router using DHCP.

try resetting the router and then reconfigure it again. or upgrade the firmware.

This is just a problem with the wireless settings of the router, you can try first to reset the router by pressing the reset button for 20 seconds while power is ON and then after that you should be able to find the default wireless name of the router which is linksys, after you reset the router just need to reconfigure it back...

I am confused, you are using 2 routers, or you using their dsl modem/router? or your original??

Hold the reset button on the router for 30 second, do not let go of it after the diag LED turns off, continue holding it until 30 seconds have passed. After you?ve done this, the router will revert to factory defaults, all of your settings will be lost. By default the default Password for the router is admin, and there is no User Name.

1. Right-click on the icon in your taskbar that represents your wireless Internet connection.
2. Select "Open Network and Sharing Center." 3. Click "Manage Wireless Networks."
4. Click the icon that represents the wireless Internet connection you are trying to recover the password for. Select "Properties" from the toolbar.
5. Select the "Security" tab. check the "Show Characters" box to display the password for that particular wireless Internet connection.

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