wifi network is not working

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http://askubuntu.com – I'm trouble working wifi network,it works fine in windows but with ubuntu never works but works only in wired mode. I have full knowledge on networking using windows,why am i getting issue connecting with ubuntu even my wifi card is compatible with linux os. Note:works fine with windows,wifi on/network name and securuty is all done now i'm getting issue not working with ubuntu. (HowTos)