How do you upgrade the recording levels for djay2 mixes. My mixes are recording really low.

My DJay2 recordings seem to be recording at a very low rate. It’s very hard to hear the mixes when I play them back. The mixes seem to be a half the levels of any other mp3s I have on file. Do you have any tips on a) original recording levels or b) modifying the files after you post the mixes on your hard drives?