networking going all wrong

I am using a network script that i think should work (and it does if i use 2 instances on my pc). But my friend opened the server (on a port that worked with another project) and it didn't work, i simly got the message that it couldn't connect to the server.

i don't understand this at all but this is my script.

 #pragma strict
 var mySkin : GUISkin;
 var state = 1;
 
 var IP : String = "ip adress";
 var port : int = 20005;
 var connected : boolean = false;
 
 private var name1 : String = "unit1";
 private var name2 : String = "unit2";
 private var name3 : String = "unit3";
 private var name4 : String = "unit4";
 private var name5 : String = "unit5";
 
 function Start () 
 {
     Time.timeScale = 1;
     name1 = PlayerPrefs.GetString("Name1");
     name2 = PlayerPrefs.GetString("Name2");
     name3 = PlayerPrefs.GetString("Name3");
     name4 = PlayerPrefs.GetString("Name4");
     name5 = PlayerPrefs.GetString("Name5");
 }
 
 function Update ()
 {
     if(Network.peerType == NetworkPeerType.Client || Network.peerType == NetworkPeerType.Server)
     {
         connected = true;
     }
 
     if(Network.connections.Length > 0)
     {
         Application.LoadLevel("1");
     }
 }
 
 function OnGUI () 
 {
     GUI.skin = mySkin;
       
       
       
     if(state == 1)
     {
         GUI.Box(new Rect(Screen.width/2-150, 0, 300, Screen.height), "Menu");
         if(GUI.Button(new Rect(Screen.width/2-150,Screen.height/2-200,300,30), "Play"))
         {
             state = 2;
         }
         if(GUI.Button(new Rect(Screen.width/2-150,Screen.height/2,300,30), "Site"))
         {
             UnityEngine.Application.OpenURL("http://eyeongames.weebly.com/");
         }
         if(GUI.Button(new Rect(Screen.width/2-150,Screen.height/2+200,300,30), "Quit"))
         {
             Application.Quit();
         }
         if(GUI.Button(new Rect(Screen.width/2+500, Screen.height/2+300, 70, 40), "Crew"))
           {
               state = 3;
           }
     }
     else
     if(state == 2)
     {
         GUI.Box(new Rect(Screen.width/2-150, 0, 300, Screen.height), "Menu");
         if(GUI.Button(new Rect(Screen.width/2-150,Screen.height/2-200,300,30), "Host"))
         {
             state = 4;
         }      
         if(GUI.Button(new Rect(Screen.width/2-150,Screen.height/2,300,30), "Join"))
         {
             state = 5;
         }
         if(GUI.Button(new Rect(Screen.width/2-150,Screen.height/2+200,300,30), "Back"))
         {
             state = 1;
         }
         if(GUI.Button(new Rect(Screen.width/2+500, Screen.height/2+300, 70, 40), "Crew"))
           {
               state = 3;
           }
     }
     else
     if(state == 3)
     {
         GUI.Box(new Rect(Screen.width/2-100,Screen.height/2-125,200,250), "Crew");
         
         if(GUI.Button(new Rect(Screen.width/2+500, Screen.height/2+300, 70, 40), "Back"))
           {
               state = 1;
               PlayerUnitNames.Save(name1, name2, name3 ,name4, name5);
           }
         
         name1 = GUI.TextField(new Rect(Screen.width/2-100, Screen.height/2-70, 200, 25), name1);
         name2 = GUI.TextField(new Rect(Screen.width/2-100, Screen.height/2-40, 200, 25), name2);
         name3 = GUI.TextField(new Rect(Screen.width/2-100, Screen.height/2-10, 200, 25), name3);
         name4 = GUI.TextField(new Rect(Screen.width/2-100, Screen.height/2+20, 200, 25), name4);
         name5 = GUI.TextField(new Rect(Screen.width/2-100, Screen.height/2+50, 200, 25), name5);
     }
     else
     if(state == 4)
     {
         GUI.Box(new Rect(Screen.width/2-150, 0, 300, Screen.height), "Host");
         port = int.Parse(GUI.TextField(new Rect(Screen.width/2-150,Screen.height/2,300,30), port.ToString()));
         if(GUI.Button(new Rect(Screen.width/2-150,Screen.height/2+200,300,30), "Go"))
         {
             state = 6;
             Network.InitializeServer(32, port, false);
         }
     }
     else
     if(state == 5)
     {
         GUI.Box(new Rect(Screen.width/2-150, 0, 300, Screen.height), "Join");
         IP = GUI.TextField(new Rect(Screen.width/2-150,Screen.height/2-200,300,30), IP);
         port = int.Parse(GUI.TextField(new Rect(Screen.width/2-150,Screen.height/2,300,30), port.ToString()));
         if(GUI.Button(new Rect(Screen.width/2-150,Screen.height/2+200,300,30), "Go"))
         {
             state = 6;
             Network.Connect(IP, port);
         }
     }
     else
     if(state == 6)
     {
         GUI.Box(new Rect(Screen.width/2-150, 0, 300, Screen.height), "Waiting for other player");
         if(GUI.Button(new Rect(Screen.width/2-150,Screen.height/2+200,300,30), "Back"))
         {
             state = 1;
         }
     }
 }