Not sound in all speakers :S

Hey I recently bought a 5.1 soundcard and 5.1 speakers
This is the speakers i got http://www.logitech.com/index.cfm/speak ... 1&cl=my,en
and this is the sound card http://sounden.terratec.net/modules.php ... le&sid=222

Anyway, im not sure what ports on the soundcard to put the cords from the speakers into. I got 3 cords from the speakers thats supposed to be plugged in to the pc, but only two of the ports give sound




here is a pic of the cords


So I put the black and green ones into those two ports. Now where does the orange one go? I tried all of the other ones but no sound in the center speaker.

I can unplug the green one and get sound in the center speaker by plugging it in that port but then I get no sound in two of the other speakers

any ideas? :S

It's been my experience that the lime green plug carries the sound to the speakers. I see 3 lime green jacks on the sound card. It could be that some of the speakers get connected to another speaker.

Hm so what can i do?

Are there places on the backs of the speakers to connect one to another? If only 2 of the lime green jacks carry sound, then one must be a left channel and the other right. If that's the case, there has to be a way to connect speaker to speaker. Have you tried to email support @ the sound card manufacturer?