Enums compare question C#

Hi, I get error when trying to compare my enum with its old value.

error CS0019: Operator !=' cannot be applied to operands of type GamePlayerAnimation.AnimState' and `int'

I thought the enums was some kind of fancy int´s ?

 using UnityEngine;
 using System.Collections;
 using TNet;
 
 public class GamePlayerAnimation : TNBehaviour {
 
     // Most common animation states.
     public enum AnimState
     {
         Idle,
         Walk,
         Run,
         WalkBack,
         jump
     }
     public AnimState currentAnimState;
 
     public int _oldAnimationState;
 
     // Use this for initialization
     void Start () 
     {
     
     }
     
     // Update is called once per frame
     void Update () 
     {
         if (tno.isMine)
         {
             if (currentAnimState != _oldAnimationState)
             {
                 tno.Send("AnimState", TNet.Target.OthersSaved, currentAnimState);
                 _oldAnimationState = currentAnimState;
             }
             
         }