trouble with triggers

I'm trying to get a model to stop walking, when it enters a Collider trigger, then play the attack animation...I have this script and a circle Collider on the model set to IsTrigger....when it hits the player its supposed to stop, but doesn't...The Player is tagged with player...the animation state is set to a bool,when the walking animation is played the bool is false, when the trigger is touched, the bool is true, then the attack is played.
What am I doing wrong?..The model walks right into the player and the trigger isn't working, until I back off the player a little, then it plays...the trigger just isn't triggering like its suppose to. this is all happening on a NavMesh and I'm using Unity 4.6
.

Code (CSharp):

1. using UnityEngine;
2. using System.Collections;
3.  
4. public class zombieIdleTrigger : MonoBehaviour
5. {
6.  
7.     Animator anim;
8.     NavMeshAgent agent;
9.     Transform Player;
10.  
11.     void Awake()
12.     {
13.         anim = GetComponent<Animator>();
14.         agent = GetComponent<NavMeshAgent>();
15.         Player = GameObject.FindGameObjectWithTag("Player").transform;
16.         anim.SetBool("zombieStop",false);
17.     }
18.    
19.     void OnTriggerEnter (Collider other)
20.     {
21.         if(other.gameObject.tag =="Player")
22.         {
23.             anim.SetBool("zombieStop",true);
24.             agent.speed = 0;
25.             Debug.Log("ENTERED");
26.         }
27.     }
28.  
29.  
30.  
31.     void OnTriggerExit (Collider other)
32.     {
33.         if(other.gameObject.tag =="Player")
34.         {
35.             anim.SetBool("zombieStop",false);
36.             agent.speed = 3;
37.             Debug.Log("EXIT");
38.         }
39.     }
40. }
41.  

 

Code (CSharp):

1. using UnityEngine;
2. using System.Collections;
3.  
4. public class zombieIdleTrigger : MonoBehaviour
5. {
6.  
7.     Animator anim;
8.     NavMeshAgent agent;
9.     Transform Player;
10.     public navmeshImproved navScript;
11.     public int ZombieSpeed = 0;
12.  
13.     void Awake()
14.     {
15.         anim = GetComponent<Animator>();
16.         agent = GetComponent<NavMeshAgent>();
17.         Player = GameObject.FindGameObjectWithTag("Player").transform;
18.         anim.SetBool("zombieStop",false);
19.     }
20.    
21.     void OnTriggerEnter (Collider other)
22.     {
23.         if(other.gameObject.tag =="Player")
24.         {
25.             anim.SetBool("zombieStop",true);
26.             navScript.enabled = false;
27.             agent.enabled = false;
28.             agent.speed = 0;
29.             Debug.Log("ENTERED");
30.         }
31.     }
32.  
33.  
34.  
35.     void OnTriggerExit (Collider other)
36.     {
37.         if(other.gameObject.tag =="Player")
38.         {
39.             anim.SetBool("zombieStop",false);
40.             navScript.enabled = true;
41.             agent.enabled = true;
42.             agent.speed = ZombieSpeed;
43.             Debug.Log("EXIT");
44.         }
45.     }
46. }
47.  

nevermind...needed more stuff in script