Mixtrack Quad Pre-Cuing Jack Not Working? (Mac)

I bought the Mixtrack Quad to use with Djay and had no problems until recently.

I pre-cued from the board only a few times before it decided to stop working.

Right now I have my audio setting as the main output going to my stereo and pre-cuing going to the Mixtrack Quad. I have tested both jacks with two different headphones (both headphones work fine) but have not been able to make it work.

Has anyone else had this issue or know a possible solution?