Sound or speaker can not detected by jack in my pc

[ashit]

Hello,
i am just installed windows 7 all things goes well but my speakers are not detected by the jack it shows 0channel port i have zotac n force 610i ita campatible or not plz give suggestion

 

[nikorr]

Are u plugin it in to the green one?

 

[nikorr]

Did u install the audio drivers? Do u need power for your speakers?

What speakers do u have?