just got a macbook pro, help!

Hey i just got a macbook pro,i use to have a PC
so i downloaded Cross over to my pro, left all the tables and soundcard setup how it used to be on my PC, i plugged the u46 mk2 and it doesnt work, can some one help me, how should everything be setup? should the soiundcard be on phono? and the tables be on line?
so i downloaded Cross over to my pro, left all the tables and soundcard setup how it used to be on my PC, i plugged the u46 mk2 and it doesnt work, can some one help me, how should everything be setup? should the soiundcard be on phono? and the tables be on line?