Help with multiplayer connection

Hi, i made a simple client-server based "game" but i'm having trouble connecting to the server over the internet, even though i can connect localy(got problems here aswell but anyway...). Here is my script:

 #pragma strict
 
 var IP = "127.0.0.1";
 var port = 25566;
 
 function OnGUI()
 {
     if(Network.peerType == NetworkPeerType.Disconnected)
     {    
         IP = GUI.TextField(Rect(5,65,100,30),IP.ToString());
         if(GUI.Button(Rect(5,5,100,30), "Start"))
         {
             Network.InitializeServer(32,port);
         }
         if(GUI.Button(Rect(5,35,100,30), "Connect"))
         {
             Network.Connect(IP,port);
         }
         
     }
     else
     {
         if(Network.peerType == NetworkPeerType.Client)
         {
             Application.LoadLevel(1);
         }
         if(Network.peerType == NetworkPeerType.Server)
         {
             GUI.Label(Rect(5,5,100,25), "Server");
             GUI.Label(Rect(5,30,100,25), "Users: " + Network.connections.Length);
             if(GUI.Button(Rect(5,55,100,25),"Quit"))
             {
                 Network.Disconnect(100);
             }
         }
     }
 }