U-Mix44 Interface!

I am not getting any sound out of the sound card (interface). I'm using a MAC and am using the EasyRec software. The mixer i use is the Gemini CTRL One MIDI Controller . I've turned up the volume on the output and input of my computer (OS system volume) and I have my headphones plugged into the sound card but I'm not getting any sound out of it. PLEASE HELP !! I need to use my equipment on Sunday to DJ!