Unity Collision Doesn't Work when Two Players Instantiated

I am using Unity3D and I have a problem. I have a script which instantiates the player gameobject once you are connected to the server. I also have an attack script. When there is only 1 player on, everything works fine. When the second player comes on, the attack doesnt work! I did Debug.Log and I found out that when you clicked the other player to attack instead of attacking him, you are attacking the terrain below it. Here is my code. Instantiate Code:

 GameObject myPlayer = PhotonNetwork.Instantiate (character, mySpawn.transform.position, mySpawn.transform.rotation, 0) as GameObject;

Attack code:

 using UnityEngine;
 using System.Collections;
 
 public class SendAttackInfo : Photon.MonoBehaviour
 {
     public float damage = 100;
     // Use this for initialization
     void Start()
     {
 
     }
 
 
 
     void Update()
     {
 
         bool RMB = Input.GetMouseButtonDown(0);
         if (RMB)
         {
 
             RaycastHit hit;
             Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);
             if (Physics.Raycast(ray, out hit, 100))
             {
                 Debug.Log("We arm-hit: " + hit.collider.name);
 
                 hit.collider.transform.gameObject.GetComponent<PhotonView>().RPC("ApplyDamage", PhotonTargets.AllBuffered, damage);
                 hit.collider.transform.FindChild("Cube").GetComponent<PhotonView>().RPC("ApplyDamage", PhotonTargets.AllBuffered, damage);
             }
         }
     }
 }

Please help!