Ok, a couple things:
What type of router/wireless card did you buy? I went with Linksys almost exclusively, but did purchase "other" brands of wireless PCI cards for my kids' computers. So far they have all worked great with no problems.
Which FTP program are you using? As far as why that won't work, I really don't have a clue yet. I've always used WS-FTP LE and it's been a dream!
Second, a thought about the IE working/Firefox not working issue. I know when I orginally set up my high speed internet (wireless DSL at that time), I didn't install any of their software, I had to go in and manually set up my router and browser. The settings I made in the brower were located at: Tools, Internet Options, then the Connections tab (Internet Explorer).
If you installed the Qwest software, more than likely it changed your IE connections setting automatically. When you originally set up Firefox, you probably imported your IE settings, which was set to dialup. So I'm wondering if you re-imported your IE settings now, it might pick up the new connections settings??
Speaking of browsers, has anyone else tried the new Opera browser? It's pretty slick, maybe even better than Firefox
Hopefully by the time you see this you've already fixed your issues. If not, I'd be more than happy to come over and try to help if you'd like. You can reach me at 598.7176