Help on Sound Card! ! !

[mario luce]

well here look... i bought this speakers and i got em today but the thing is that some work when i connect the orange color, and other works when i connect the black color.
http://www.newegg.com/Product/Showimage.as...peaker+-+Retail

and i plugged it on my pc but look at my sound card...

and i think i have to buy a new sound card witch has a black thingy so i can put the orange and black one..

help me out please!!!