[ubuntu] Can´t connect my Ubuntu 11.1 to my WIFI

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http://ubuntuforums.org – Hello hopping someone can help with my internet issue. My problem started last night, I could not connect to internet. In the mornning I restarted my router and same thing. So I tried different stuff from forums but have not been able to solve it. I found out that I can connect to other wifi networks (neighbors) and with my wife`s laptop and other devices connection to my wifi netwk works just fine. My pc is 32 bit running ubuntu 11.10, I tried changing DNS settings for the network but it does not work... I suspect the last update did the bad trick... Help please (Hardware)