Recording with virtual Dj

hi all, im using vdj 8.4 and mc4000 and i want to record some mixes and use the mic. I have read that due to the way the controller works it wont pic up the mic sound. so i have bought a behringer usb mixer to plug the mic into , could you tell me how to set this up in the settings so it all works ? I have read about re loop , but not sure how it works also any other suggetions to get the mic on recordings would be appreciated