Reply to Pro 2 glitch when hooked up to s4

My Pro 2 keeps glitching when it is hooked up to my s4. The audio wave is glitching. The software doesn't do it when it's disconnected from the s4, and I run it using only the keyboard. I've attempted to reinstall pro2 twice and it hasn't worked. It has to be something with the controller then. It seems to glitch when I set loops, sync between decks, and if I scroll through a song it will glitch when I stop.

Are there any drivers that I may not have installed that go with the s4? Thanks!