Newbie to forum and software...NEED HELP

Hi all,
Just joined up after purchasing the ION Discover DJ and the Mixvibes software came with it. My name is Carl and I have only really messed about and have a play, nothing serious.
I live in the West Midlands, so I see someone has not long joined localish too.
Have been playing with the software and so far so good. I am a bit new to it all though, used to have a couple of cd mixers I used to have a play on every now and then a good few years ago.
As most music is on my computer now I decided to get something cheap to start off with, so I can have another go.
I discovered that you were not able to listen to a song before cueing it having only one soundcard built into the Mac. So I have purchased a USB soundcard that has some inputs and outputs that will hopefully help. It has Mic in, Line In, Front Out, Rear Out, CEN/Bass out, SPDIF In and SPDIF Out.
My trouble is I am having problems setting up the settings, I seemed to of tried everything to get it working but so far nothing.
I am not bothered which way round I get it, best way would be for me to listen to cueing music through the laptop and use the USB soundcard for external to speakers.
Having being a noob I have no idea what I am doing set up wise, any help would be appreciated.
I purchased the soundcard from eBay, the one below
http://www.ebay.co.uk/itm/230651808314? ... 788wt_1114
After purchasing the soundcard I came across when looking at some headphones, the Numark PHX USB headphones. Would these of been a better and simpler option to go for?
Any help gratefully received
Just joined up after purchasing the ION Discover DJ and the Mixvibes software came with it. My name is Carl and I have only really messed about and have a play, nothing serious.
I live in the West Midlands, so I see someone has not long joined localish too.
Have been playing with the software and so far so good. I am a bit new to it all though, used to have a couple of cd mixers I used to have a play on every now and then a good few years ago.
As most music is on my computer now I decided to get something cheap to start off with, so I can have another go.
I discovered that you were not able to listen to a song before cueing it having only one soundcard built into the Mac. So I have purchased a USB soundcard that has some inputs and outputs that will hopefully help. It has Mic in, Line In, Front Out, Rear Out, CEN/Bass out, SPDIF In and SPDIF Out.
My trouble is I am having problems setting up the settings, I seemed to of tried everything to get it working but so far nothing.
I am not bothered which way round I get it, best way would be for me to listen to cueing music through the laptop and use the USB soundcard for external to speakers.
Having being a noob I have no idea what I am doing set up wise, any help would be appreciated.
I purchased the soundcard from eBay, the one below
http://www.ebay.co.uk/itm/230651808314? ... 788wt_1114
After purchasing the soundcard I came across when looking at some headphones, the Numark PHX USB headphones. Would these of been a better and simpler option to go for?
Any help gratefully received