problem with 5.1 logitech speakers

[Nerox]

I have 5.1 logitech ( 4 speakers and one subwoofer), and the problem is that when i listen to music only 2 of the 4 speakers works! but when i go to control panel and configurate the speakers y check the box that says 5.1 surround and when it cheks it run like a test to see if all the speakers works .. and it does!!it cames sound of all of the speakers but when in listenign to itunes or the wndows media player the sound only appears on 2 of the 4 speaker .. mm please help me!! and sorry for my english!!

 

[KingLoftusXII]

Windows says it's 5.1, but double check on your sound cards software it's set up for 5.1. It usually defaults to 2 speakers.