Altec ADA885 Computer Stereo Subwoofer not working.?

[spezo21]

I have a desktop with integrated audio. The motherboard is a GA-MA78GM-S2H and the audio should be a Realtek ALC889A chipset.
I was trying to hook up a Altec Lansing ADA885 system to it but i can't get the subwoofer to work. Every other speaker seems to work but the sub.

Anyone got any ideas what I'm doing wrong?

 

[KsiDornseif]

maybe your not hooking up the correct wires to the integrated audio ports, otherwise im not sure. is it a faulty subwoofer?

 

[KsiDornseif]

maybe your not hooking up the correct wires to the integrated audio ports, otherwise im not sure. is it a faulty subwoofer?