Network.Instantiate crashes my game

So I am not sure what I did but I had this working at one point now it doesn’t.

To give an overview of what is going on when a player clicks the join the game it will spawn a prefab owned by that connected user.
Here is the code that is called when clicking to join the game:

if(networkView.isMine){
				if(PersistantObject.readyplayers == PersistantObject.connectedplayers ){
					if(GUI.Button(new Rect(230,200, 150, 50), "Join Game")){
						if(do_once){
							inLobby = false;
							networkView.RPC("IncJoinedPlayers", RPCMode.AllBuffered);
							SpawnPlayer();
							do_once = false;
						}//end do_once
					}//end button
				}//end readyplayers = connected player
			}//end networkview.ismine

Now here is the code for the “SpawnPlayer()” function that is called:

private void SpawnPlayer()
	{
		if(networkView.isMine){
			inLobby = false;
			if (PersistantObject.ImAGhost) {
				Network.Instantiate(prefab_ghost, GhostLocation.transform.position, Quaternion.identity, 0);
			}else{
				if(chr_number == 1){
					Network.Instantiate(playerPrefab_ethan, spawnLocation.position, Quaternion.identity, 0);
				}else if(chr_number == 2){
					Network.Instantiate(playerPrefab_robot, spawnLocation.position, Quaternion.identity, 0);
				}else if(chr_number == 3){
					Network.Instantiate(playerPrefab_goblin, spawnLocation.position, Quaternion.identity, 0);
				}
			//chr_number = 0;
			networkView.RPC ("IncListCount", RPCMode.AllBuffered);
			}
		}
	}

The “chr_number” is the chosen character in prior menu screens.
So it works if I test it by myself but if I test a server and client then it crashes unity and freezes the other that I am testing as soon as I click “Join Game” button.

Any help on this would be amazing. I found some similar issues with network.instantiate on other forums but nothing that can fully answer my question.

Here is a picture of the button that is pressed, its an OnGUI() call:
34113-gui_buttons.png

Well I may have just solved my problem! I feel dumb for not checking this before but hopefully this will help someone else out that is having the same problem that I was. The first thing that I did was I turned off my firewall. Now this is good for testing just make sure not to leave it off ;). Then I changed one line of code that was listed above. In OnGUI() script, not the SpawnPlayer() script, I removed the line
if(Network.isMine). After doing those two things everything started working again.
Summery:
Turn off your firewall
Check to make sure you’re using Network.isMine in the correct location