Reply to how to hear from headphones with vestax typhoon

hi,i'm new in djiing and so i'm so inexpert. i've bought a vestax typhoon and i have the latest version of snow leopard.simply when i run traktor and play music with the device the sound only goes out from the typhoon and not from the computer,that i can connect more easy to my stereo.another problem is when i want to find a cue point so i press the "headphones button" but when i work on the jogwheels the sound from the stereo is the of the headphones.can anyone help me please??? thanks so much for your time