Can't connect to Server :(

Hey guys,
thats my code (sorry for that german/english mix at code):

#pragma strict

private var refreshing:boolean;
private var hostData:HostData[];
private var enteredName;
private var connectables;
private var statusLineTXT;

function Start () {

	enteredName = "TestServerName";
	statusLineTXT = "Doing nothing...";

}

function Update () {

if(refreshing) {
	if(MasterServer.PollHostList().Length > 0) {
	
	refreshing = false;
	Debug.Log(MasterServer.PollHostList().Length);
	hostData = MasterServer.PollHostList();
	statusLineTXT = "Refreshed Serverlist...";
	}
}

}

function startServer() {
	
	statusLineTXT = "Starting Server...";
	Network.InitializeServer(20, 25001, !Network.HavePublicAddress());
	
	
	MasterServer.RegisterHost("fmasterInteractive_MotH_Networking",enteredName);

}

function refreshHostList() {

	MasterServer.RequestHostList("fmasterInteractive_MotH_Networking");
	refreshing = true;
	statusLineTXT = "Refreshing...";

}


function OnServerInitialized() {

Debug.Log("Server hosted...");
statusLineTXT = "Initialized Server...";

}

function OnMasterServerEvent(mse:MasterServerEvent) {

	if(mse == MasterServerEvent.RegistrationSucceeded) {
	
		Debug.Log("Registered Server at MasterServer...");
		statusLineTXT = "Registered Server at MasterServer...";
	
	}

}

function OnGUI() {

	GUI.Box(Rect(755,100,220,50), statusLineTXT.ToString());
	if(!Network.isClient!Network.isServer) {
		enteredName = GUI.TextField(Rect(100,100,150,20), enteredName);
		GUI.Box(Rect(400,100,350,50), "Serverbrowser");
		
		
	
		if(GUI.Button(Rect(100,125,150,50),"Server hosten")) {
					
					Debug.Log("Start hosting server...");
					startServer();
					
			}
		if(GUI.Button(Rect(100,300,150,50),"Serverliste abrufen")) {
					
					Debug.Log("Start Refreshing...");
					refreshHostList();
					
			}
			if(hostData) {
			for(var i:int = 0; i < hostData.length; i++) {
			
				connectables = hostData[i].playerLimit-1;
				GUI.Box(Rect(400, 35*i+180, 150,25), hostData[i].gameName);
				GUI.Box(Rect(600, 35*i+180, 150,25), hostData[i].connectedPlayers + " / " + connectables);
				if(GUI.Button(Rect(755, 35*i+180, 150,25), "Verbinden")) {
				
					Debug.Log("Connecting...");
					statusLineTXT = "Try to connect...";

					Network.Connect(hostData[i].ip,hostData[i].port);
					Debug.Log("Connected!");
				}
				
			
			}
			}
		
		}
		if(Network.isServer) {
		
		GUI.Box(Rect(Screen.width/2, Screen.height/2, 200,200), "You're hosting right now!");
		if(GUI.Button(Rect(Screen.width/4, Screen.height/4, 200,200), "Stop Server")) {
			
		}
		
		}

}

I also tried to use my IP and games Port at Network.Connect and the hostData*-Method. Actually I recieve a Pong from my Host, but it don’t connect. Pls help me! ;)*

Have you port forwarded port 25001 to the hosts IP address?