YOUR SUGGESTIONS WORKED. I ALSO HAD TO INSTALL DRIVERS AT SAME TIME AS SOUNDCARD. MAKES SENSE

Hi everyone, thanks for answering vdwielto's installation question. Now I'm having this same problem on Windows XP with Virtual DJ but the solutions offered before aren't fixing it. This setup should be working, but when I launch Virtual DJ I get an error message stating "Error in the ASIO sound driver" I've downloaded the updated drivers and still the same problem. It seems as if my computer isn't reading the USB Audio Device since its not showing a second one in Device Manager and when I go into Virtual DJ it only gives me the ASIO soundcard option and not U46DJ. Here's vdwielto's original post to give more context. Any suggestions? ....
I have an issue with installing the mixvibes soundcard U46DJ MK2 on my laptop.
After installation (with the CD) the U64DJ control panel is all grey / blocked / unabled. It does not distinguish any channels. So in my Traktor
(VIRTUAL DJ for me) program i can only select one channel.
The music from my laptop passes through the soundcard to my amplifier but there is no monitor channel that i can use to pre-listen my tracks.
what i ideally want to do is put one of my decks (on Traktor) on cue to pre-listen it through my headphones.
I have already guessed about possible causes:
1. The MK2 installation manaul states there should be 2 instances of "USB audio device" in the windows Vista > system > sound menu. I noticed that there is only one instance of U46DJ
2. the sound setup of Vista is put on 5.1. dolby surround, some forums state that you have to select the 'quadraphonic' option, which i don't have on my vista.
I HAVEN"T SWITCHED THE SOUND SETUP, I DONT KNOW WHICH TO USE But i don't have a solution yet so all advice and help is welcome!