"look at target" problem

hey... I asked sth that mr. aldo nalleto answered me... it works good But I have a problem! this script will look at the target but not perfectly... it just change the rotation of Y... I don't know what to do... if you played fallout you see that when we start chat with someone every thing will stop and camera will go on the person ( target) I exactly want that. thanks to aldo the script just work great but looking doesn't... I want that when I placed an object in 3d world and put that as target in this script , the camera go just on that object , from any angle , any place , just go on that... if any one can edit this to the one that I sayed it would be great ...( and this is the full script that mr. aldonalleto told:)

 using UnityEngine;
 using System.Collections;
 public class Treeger : MonoBehaviour
 {
 
     public GameObject MC;
     public Transform target;
     public float timeLook = 0.5f;
     public float timeWait = 4f;
 
     void Start()
     {
         MC = GameObject.Find("Durbin Asli");
     }
    
     bool looking = false;
 
     IEnumerator OnTriggerEnter(Collider obj)
     { // make OnTriggerEnter a coroutine
         CharacterControl.tree--;
         audio.Play();
         if (looking) ; // does nothing if already looking  
         looking = true; // I'm going to look
         EnableScripts(obj.transform, false); // disable all obj scripts
         EnableScripts(MC.transform, false); // disable all camera scripts
         Quaternion rot1 = MC.transform.rotation; // save initial direction
         // define target direction in rot2
         Quaternion rot2 = Quaternion.LookRotation(target.position - MC.transform.position, Vector3.up);
         for (float t = 0f; t < 1f; )
         { // look at target in timeLook seconds
             t += Time.deltaTime / timeLook;
             MC.transform.rotation = Quaternion.Lerp(rot1, rot2, t);
             yield return null;
         }
         yield return new WaitForSeconds(timeWait); // wait timeWait seconds
         for (float t = 0f; t < 1f; )
         { // return to original direction in timeLook seconds
             t += Time.deltaTime / timeLook;
             MC.transform.rotation = Quaternion.Lerp(rot2, rot1, t);
             yield return null;
         }
         EnableScripts(obj.transform, true); // enable obj scripts
         EnableScripts(MC.transform, true); // enable camera scripts
         looking = false; // finished looking
         Destroy(gameObject);
     }
 
 void EnableScripts(Transform owner, bool onOff){
   MonoBehaviour script;
   script = owner.GetComponent<MouseLook>();
   if (script) script.enabled = onOff;
   script = owner.GetComponent<FPSWalker>();
   if (script) script.enabled = onOff;
   script = MC.GetComponent<MouseLook>();
   if (script) script.enabled = onOff;
 }
 
 
 
 
     }