[ubuntu] Wifi problem!!!

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http://ubuntuforums.org – HI i am currently on Ubuntu Ubuntu 10.04 LTS,i am using a ASUS eee pc 100H...Problem is my computer cannot connect to my wifi network.yet it reads all of the available networks in the area just fine..what could be the problem? i double checked my password and everything else in my house connects just fine to it except this laptop, its weird because this has never happened before...before this i had installed the latest ubuntu 12.0 i think it was and the wifi worked fine but it was to slow for my netbook so i uninstalled it. i dont know if it was a netbook edition of ubuntu but i did not like i (Hardware)