Help with serial to midi

I'm trying to use my arduino as a midi controller. My plan is to have 13 push button switches. I have the circuit built, but I'm having trouble getting it to work. I'm using serial-midi converter program and I'm also using midi-OX, but it's still sketchy. I'm very new at programming an arduino so any help would be greatly appreciated. Thanks, Sean

Please don't cross-post - it just wastes time.

Hint: don't start with 13 buttons, start with 1.