Hey, it's just one of my weak sides. I spent a day fiddling with configuration of both my Linksys router and my 2wire modem/router. I really got things screwed up. My tech was supposed to show up with another modem to try but he didn't make it.
I got a mess and seriously irritated and I went to the webpage for the Linksys router and reset to factory defaults. I did the same with the 2wire. Then I shut down the computer and unplugged both the router and modem. I'd done that before but this time I got a book and read for perhaps an hour. Then I reconnected cables, reconnected power, and waited while the router and modem reconfigured from no power.
Then I went to the router webpage, reset "gateway" to "router" on the advanced settings page and went to IE7. Everything connected with no problem.
It's been a little over 24 hours now and it's still connecting with no problem so I think it's fixed.