Linksys WRT54GS Login Failure

Hello all. I recently bought a new shiny Linksys WRT54GS router. I have 4 systems hooked up to it via ethernet and have no issues accessing the internet this way (one PowerBook, two Dell desktops, and an Xbox 360). However, the device doesn't seem to be transmitting a wireless signal (none of any of the connected computers' adapters pick it up; however, Kismac picks it up, while AirPort and the desktops' wireless network scan don't). I figured I'd dive into the config pages at 192.168.1.1, but every time I try, nothing loads on the page, except eventually I get the "Page cannot be displayed" error. I also tried using the Setup Wizard CD but at a certain step, it keeps asking for my password, which I enter, then checks my computer's status then asks for my password again, never getting past that step. In all my experience with Linksys products, these setup CDs have NEVER worked and I have had to configure things myself via 192.168.1.1. Unfortunately, now I can't even do that, as the page refuses to load from any of the computers. I am 100% sure that none of the settings have been changed from the factory defaults, because I never had the opportunity to do so. I have tried the following, with no success:

-trying 192.168.2.1
-tried every combination of unplugging and replugging and hard resetting the modem and router (including isolating the computer from the router by disconnecting the router from the modem)
-i have even tried replacing the ethernet cords connecting the devices with new ones and still nothing

Could someone please help me with this, my roommates and I would really like to get our wireless set up so we don't have to be dragging ethernet cords all around the house with our laptops.