I also have Qwest DSL
And I was having the same problems. I have an Actiontec DSL Gateway modem/802.11g router. It is a real piece of crap. It would not let me apply a WEP password. I called Qwest, and they told me it was not compatible with AirPort software. Fine, I left it open. What really started ticking me off is that my AirTunes kept dropping out, and it was driving me mental! I called Apple, Qwest, nothing! No help. After a solid month of sketchy connections and skipping AirTunes I was fed up. Last week I looked at the weblog in the router and a bunch of leechung sons of bitches, all Uni students, were getting on my connection. From the looks of the log, they were not only doing e-mail, but tons of web-surfing (porn) and one mothafuka was seeding torrents. I wanted to rage! Then-this is the best part- I looked out my window and scanned the windows: I saw some tool with a Wintel laptop on his kitchen table. It was hard to see with the naked eye, so I took out my DV camera and turned on the digital zoom. Sure enough: only the power cord connected, but he was definitely on the web and what looked like Kazaa. It was great: I pulled the cord from router and turned back at the tool on his laptop. After clicking around for a while, he knew the connection was gone. He actually slammed his fist on the table he was so pissed. He then picked up the laptop and raised it off the table and turned it towards my flat. The son of a bitch! I turned on my kitchen light suddenly and gave him the finger with both hands. The stupid jerk just stood there, then finally closed his blinds. I spent the next three hours configuring the damn router. I wanted as secure as Fort Knox! Here's what I did: I was finally able to set a WEP password. It is very picky about the ten digit code order, I set the router not to broadcast the SSID, I chose the most esoteric name I could think of for a network name (almost a password itself), I enabled 11g only, and cursed at it for good measure. It worked. Only my Macs could access the network, and the SSID did not show up in the AirPort menu. The wireless activity light only blinks when I open my PB's or wake my iMac from sleep. Otherwise, no activity. Which means that no one is mooching off my connection. The only bitch was that my AirPort Express was failing to update properly and join the now stealth network. Crap! I tried four or five times. The last time, I gave up and fired up iTunes to listen to depressing music to celebrate my failure. But, lo and behold! There was my trusty AirTunes button.
Since I did all that, no more skipping 'tunes, no more lagging before starting to open a web page, and no more freeloaders.
Sorry, this outburst was slightly off topic...
To those of you with Qwest DSL routers: try restarting the modem/router. There.