Windows Vista trouble with sound

[niksoft]

hi
i have a problem with sound in my windows

i have installed realtek ac97 audio driver and the windows has recognized it
but i cant hear any sound from my speakers or headphone

in speaker setup when i set the configuration to 'STEREO' and click the L or R Icons no sound is played

but when i set the configuration to QUADRAPHONIC , again L and R doesnt work but RL and RR play sound

in none of these configurations my speakers or headphones play musics

can anyone solve my problem ?

im really confused

 

[kemical]

Have you checked your plugged into the correct port?

Also whats showing in your sound properties?

 

[niksoft]

Have you checked your plugged into the correct port?

Also whats showing in your sound properties?

like always i have connected to the green port
and in the properties the status is 'This device is working properly.'

 

[niksoft]

is there anyone here to solve my problem ?