Multiplayer lan

I have a code for LAN multiplayer and it works on the same Laptop in two windows but it can't connect to other Laptops. Does this code require a certain type of network and does it even work on laptops? I also tried on some computers and it didn't work. Movement in the game is in a separate code and uses @RPC functions.

Here's the code for connection:

 #pragma strict
 public var connectionIP:   String = "127.0.0.1";
 public var connectionPort: int = 25001;
 
 function OnGUI () {
 if (Network.peerType == NetworkPeerType.Disconnected){
 GUI.Label(new Rect(10, 10, 300, 20), "Status: Disconnected");
 if (GUI.Button(new Rect(10, 30, 120, 20), "Client Connect")){
 Network.Connect(connectionIP, connectionPort);
 }
 if (GUI.Button(new Rect(10, 50, 120, 20), "Initialize Server")){
 Network.InitializeServer(32, connectionPort, false);
 }
 }
 else if (Network.peerType == NetworkPeerType.Client)
 {
 GUI.Label(new Rect(10, 10, 300, 20), "Status: Connected as Client");
 if (GUI.Button(new Rect(10, 30, 120, 20), "Disconnect")){
 Network.Disconnect(200);
 }
 }
 else if (Network.peerType == NetworkPeerType.Server){
 GUI.Label(new Rect(10, 10, 300, 20), "Status: Connected as Server");
 if (GUI.Button(new Rect(10, 30, 120, 20), "Disconnect")){
 Network.Disconnect(200);
 }
 }
 }