Character Cannot Move from its Spot

I've got a multi-player project where I'm using a state machine on a character (that is instantiated at a certain spot) with a character controller. The script takes input every frame, but for some reason the character won't move at all.

This is the movement section of the script:

 private void movement() {
         if (movementHorizontal > 0) {
             player.thisChar.transform.rotation = Quaternion.Euler(Vector3.zero);
         }
         else if (movementHorizontal < 0) {
             player.thisChar.transform.rotation = Quaternion.Euler(0, 180, 0);
         }
         movementDirection = new Vector3 (movementHorizontal, 0, movementVertical);
         //player.thisChar.transform.position += movementDirection * player.speed * Time.deltaTime;
         player.controller.Move (movementDirection * player.speed * Time.deltaTime);
     }

The player will turn, as expected, however they will not move from that spot. I've tried using RigidBodies, I've tried editing the position directly (hence the commented out part of the script), and even editing the position in the inspector. IT WILL NOT BUDGE.

The entire project file can be found below. I really need help, I can't figure out what's going wrong.

https://drive.google.com/file/d/0ByMNe0bC15PxekN0RHM0RWVpTFk/view?usp=sharing

(Note: I've posted this same question again because I originally sent it to the Help Room and realized that it may be too specific a problem for that area.)