Colliders Not Working

Hello,

I am making a game in which you mantain a space station. I was altering the FPSWalker script so that if you start moving in one direction, you don't stop, like in real space. Before, I could collide with the space station, because it had colliders generated (that one high res space station from the nasa package). But, when I tweaked the script, I would just pass right through it. I was using Time.deltaTime for the sliding around, so has that got anything to do with it, and if so or not, how can I fix it? Thanks.

P.S. It did this with the character controller applied and being used, so I replaced it with a collider and made the script stop referencing the CC, but with the exact same results. Also, regenerating the colliders didn't work either. I even tried using a rigidbody, but with no dice.

Code:

 var speed = 6.0;
 var jumpSpeed = 6.0;
 var gravity = 20.0;
 var random : boolean;
 var slideForward : boolean;
 var slideBackward : boolean;
 var slideLeft : boolean;
 var slideRight : boolean;
 var slideUp : boolean;
 var slideDown : boolean;
 var inSpace : boolean;
 slideForward = false;
 slideBackward = false;
 slideLeft = false;
 slideRight = false;
 slideUp = false;
 slideDown = false;
 inSpace = true;

 private var moveDirection = Vector3.one;
 private var grounded : boolean = false;


 function FixedUpdate() {


 if (random == false) {
     moveDirection = new Vector3(Input.GetAxis("Horizontal"), 0, Input.GetAxis("Vertical"));
     moveDirection = transform.TransformDirection(moveDirection);
     moveDirection *= speed;
     
     if (Input.GetKey (KeyCode.Q)) {
         moveDirection.y = jumpSpeed;
         slideUp = true;
         slideDown = false;
         slideForward = false;
         slideBackward = false;
         slideLeft = false;
         slideRight = false;
     }
     
     if (Input.GetKey (KeyCode.E) ) {
         moveDirection.y = -jumpSpeed;
         slideUp = false;
         slideDown = true;
         slideForward = false;
         slideBackward = false;
         slideLeft = false;
         slideRight = false;
     }

 // sliding
     if (slideForward)
         transform.Translate(0, 0, Time.deltaTime * speed);
 
     if (slideBackward)
         transform.Translate(0, 0, -Time.deltaTime * speed);
         
     if (slideLeft)
         transform.Translate(Time.deltaTime * speed, 0, 0);
         
     if (slideRight)
         transform.Translate(-Time.deltaTime * speed, 0, 0);
         
     if (slideUp)
         transform.Translate(0, Time.deltaTime * jumpSpeed, 0);
         
     if (slideDown)
         transform.Translate(0, -Time.deltaTime * jumpSpeed, 0);
      }
 // slide boolean activators    
     if (Input.GetKey (KeyCode.W) && inSpace == true) {
         slideForward = true;
         slideBackward = false;
         slideLeft = false;
         slideRight = false;
      }
         
     if (Input.GetKey (KeyCode.S) && inSpace == true) {
         slideBackward = true;
         slideForward = false;
         slideLeft = false;
         slideRight = false;
      }
         
     if (Input.GetKey (KeyCode.D) && inSpace == true) {
         slideLeft = true;
         slideRight = false;
         slideForward = false;
         slideBackward = false;
      }
         
     if (Input.GetKey (KeyCode.A) && inSpace == true) {
         slideRight = true;
         slideLeft = false;
         slideForward = false;
         slideBackward = false;
      }
 
 moveDirection.y -= gravity * Time.deltaTime;
 }