Raycasting Stopped Working all of a sudden

Hello, i am using a script to select units with raycasting. While the script used to work just fine. All of a sudden it stopped hitting both the terrain and the objects. I have many objects with colliders on them. I haven't changed the lenght of the ray, nor the camera position. I am checking in the code whether the name of the object that's hit is Archer or not. But even if i remove that condition. The Position of the object hit is always 0,0,0. There's nothing in front of the camera. The y value of my colliders are too high.20 of x value is equal to my 17.500 of y value on colliders only.. Don't know what causes them to shrink so much. Edit: I figured it only works if the collider is long enough towards the camera, but then i have to make it gigantic. I tried using mathf.Infinity Please help me. Here is the code that uses raycasting.

 using UnityEngine;
 using System.Collections;
 using UnityEngine.UI;
 public class UnitSelectArcher : MonoBehaviour {
     Ray ourRay;
     RaycastHit hit;
     public Camera MainCamera;
     public bool unitSelected=false;
     public Button MoveButton;
     public Button AttackButton;
     public Canvas ActionMenu;
     public string unitName="Archer";
     float targetX;
     float targetZ;
     bool Moving=false;
     public float speed=2f;
     public GameObject kup;
     public Transform spawnPoint;
 
     // Use this for initialization
     void Start () {
         MainCamera = MainCamera.GetComponent<Camera> ();
         MoveButton = MoveButton.GetComponent<Button> ();
         AttackButton = AttackButton.GetComponent<Button> ();
         ActionMenu.enabled = false;
         targetX=transform.position.x;
         targetZ = transform.position.z;
     }
 
     // Update is called once per frame
     void Update () {
         ourRay = MainCamera.ScreenPointToRay (Input.mousePosition);
         if (Physics.Raycast (ourRay, out hit, 100)
             && Input.GetMouseButtonDown (0)
             //&& hit.collider.gameObject.name == "Archer"
         ) { 
             unitSelected = true;
             Debug.Log ("{0}", hit.transform);
 
         }
         
         if (unitSelected == true) {
 
             ActionMenu.enabled = true;
         }
             MoveButton.onClick.AddListener (MoveButton_Clicked);
             // The Object clicked on moves to the Target Location
         if (Input.GetMouseButtonDown (0) && Moving == true) {
             targetX = hit.transform.position.x;
             targetZ = hit.transform.position.z;
         }
     /* Deneme aşamasında ama yemiyor
         if (Input.GetMouseButtonDown (0)) {
             if (hit.collider.transform.name == name)
                 unitSelected = true;
             else {
                 unitSelected = false;
                 Moving = false;
             }
         }
     */
         if (Moving == true ) {
             
             //Debug.Log (string.Format ("targetX:{0}, targetZ:{1}", targetX, targetZ));
             if (targetX > transform.position.x)
                  {
                     Vector3 temp = new Vector3 (0.1f, 0, 0);
                     transform.position += temp;
 
                 }
             else if (targetX < transform.position.x)
                 {
                     Vector3 temp = new Vector3 (0.1f, 0, 0);
                     transform.position -= temp;
                 }
             if (targetZ > transform.position.z) {
                 Vector3 temp = new Vector3 (0, 0, 0.1f);
                 transform.position += temp;
 
             }
             else if (targetZ < transform.position.z)
             {
                     Vector3 temp = new Vector3 (0, 0, 0.1f);
                     transform.position -= temp;
         }
             unitSelected = false;
         }
 
         }
     public void MoveButton_Clicked()
         {
         Moving = true;
         }
 }