left and right channel sound are playing only out of left channel. cant figure anything out

[ilJUWOO]

this is horrible. i have no clue how to fix this and i cant find a solved solution anywhere. win 7, gigabyte udr3.

 

[alyoshka]

Push the 3.5mm Speaker jack into the mobo audio out properly.
Also check if you've put it in the right one.