Update for M audio Quad???

Hello, this is my first interface. I bought this a couple days ago. I don't know if i'm doing something wrong. I have OS 10.9.4 there was no up to date driver..? I tried the beta one but its not working right. I have a Korg Kronos hooked up to the front of the quad, and have studio monitors hooked to the back of the quad. when my korg is hooked directly to the the laptop it picks up but when i have it hooked up to the back of quad it doesn't..? I'm new to midi so any beginners suggestions would be great. Thank you
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