Karaoke Music going through only one set of speakers (911)

[karaokeG]

Every since I bought the upgrade I have had nothing but problems. Urghhhh.
My main problems is that the singers voices goes through both set of speakers but the music only goes on one. I have put in another sound card. Dj on one, Karaoke on the other. When i run dj everything is great. I have switched sound cards, checked all cables and cords
I can not figure out what is going on. I have looked at settings cant find nothing there either. What could be my problem?,
My pc is the hoster rack system
I know both speakers work since dj runs great on either soundcard.
any help is appreciated.