My 5 Macs again without wifi, all at once

Again something mysterious that I thought was solved buying a new router (Linksys WRT160N, don’t buy BTW). Suddenly, my 5 Macs (2 iMac’s, Air, PowerBook and iPhone) can’t connect wirelessly, again.

It’s SO frustrating, and any solution given online, turns to be no solution at all. I don’t get it. Maybe it’s just because of to much wireless networks around me? I only see 4 or 5 of them, of those that I can see that is..

No, and changing MTU stuff doesn’t help..

 Nov  4 21:11:19 air airportd[4092]: Error: Apple80211Associate() failed -6 Nov  4 21:11:19 air SystemUIServer[3924]: Error: airportd MIG failed = -6 ((null))  (port = 69675)

I’m really getting tired of this.. and I’ll look into cable again.. which sucks at my place..

UPDATE: frustrated I went on kicking away my Linksys and using again only my Fritz!

Box router. It didn’t work right away, but after changing to WPA and keeping trying and trying.. it magically started to work again.. ARGH