Lost wireless network!

A few months ago we moved and got a new internet connection. We are using a Linksys wireless box, WRT54G2. I had to call Linksys and spend an hour on the phone setting up the connection and making sure it was secured with a password and all. Since then, we've had no problems. I noticed last week, though, that we could not connect to our named network. We actually cannot even find it on the list of networks in range. The modem and wireless box are both running fine. Usually we can connect to a random 'linksys_wps_2029' network, but one of the two laptops says that network needs a password, while the other laptop and the desktop can connect to it no problem. We just can't get through to our actual network... And the warranty is expired on our box so we'll get no help from Linksys.

How can I recover our secured network? or re-secure our box?

 

Probably the easiest way to do it would be to go wired directly into the device and connect to the web interface page, probably 192.168.100.1. It should then ask for a password. I'm not sure what the linksys it, try admin, then admin, or linksys and admin. Then go into the wireless tab and ensure that the wireless interface is turned on, SSID is set and then retype the security key.

 

Default IP address for router is 192.168.1.1 Type this in browser address bar to reach configuration pages of router.
Default username - (left blank)
Default password - admin
Default SSID - linksys
Linksys support page for setting up wireless - http://linksys.custhelp.com/cgi-bin/linksys.cfg/php/enduser/std_adp.php?p_faqid=3967
At the bottom of this page are links to additional pages for this router.

To reset router completely to factory defaults - Press reset button at back of router and hold for approximately 30 seconds while power is on.