My Linksys WRT54G v5 is giving me troubles. Moved to a new place where I don't have access to the modem. So I'm trying to install the router so I can use wireless.

Here's the skivvy: Plug router in, plug modem in. Modem connected to the appropriate "INTERNET" ethernet input, while the computer is connected to one of the four ports. I update the firmware on the router, mess with some settings, but to no avail can I access the internet through the wireless network the router broadcasts or through the computer's connection to the router. When the modem is connected directly to the computer, no problems, internet. I've tried power cycling either device, as well as duplicating the computer's MAC address. I've reset back to factory, hopefully someone here can help me.

I wish I could research and work extensively on this myself, but unfortunately I have a very finite amount of time on the connected computer day to day. I would really appreciate any and all help, I'm in need of contacting my family on Skype via my iPad, as well as making my once astonishingly entertaining iPad useful again. I'll comment with a relevant screenshot.

Thank you.

UPDATE: Imgur album of some of the router's setting pages.

UPDATE 2: Solved with no help from this subreddit. Award for the "Least Helpful Support Subreddit" goes to /r/techsupport!