Need help with Zalman 5.1 headphones ( probably any 5.1 system actually )

okay so i bought Zalman 5.1 surround speakers and when i connect it i only hear center. I plugged all cables respectivelly, F to front R to rear and C to center, when i do my soundcard detects when i plug and it seems okay but when i test the sound no sound is coming from front and rear. does anybody knows why ?

Do i need to install some drivers or something ?

my card is the onboard 7.1 card that was with my motherboard (Motherboard is MSI P45 NEO-F)

thx in advance

still bumping...

i also have the static problem but only when the sound is really high and its annoying, whats the amp you got can you give me a link ? and also how exactly do i switch off the "auto sensing" you talk about ?

btw thx for reply

Try this:

Control Panel > Sounds and Audio Devices > Speaker Settings > Advanced > Select 5.1 Surround Sound.

wow it worked for 5sec... then it stopped...

thx for the advice, but i dont undestand why it worked and then stopped.

i did the speaker test once it worked except that my right sound was like 50% lower than my left sound, and then i tried a 2nd time and rear speakers were not working anymore...thats very weird