Problems accesing Web Service on LAN

Hi everybody,

I´m starting to dive into the web services and the IIS world and i´m having a problem. My OS is windows xp prof. and i´ve installed IIS 6.0. For code programming i´m using Visual Studio 2005.

I´ve created a simple web service in C#, it´s code:

using System;
using System.Data;
using System.Web;
using System.Collections;
using System.Web.Services;
using System.Web.Services.Protocols;
using System.ComponentModel;

namespace MyService
{

[WebService(Namespace = "http://codeproject.com/webservices/",
Description = "This is a demonstration WebService.")]
public class Service1 : System.Web.Services.WebService
{

[WebMethod]
public string HelloWorld()
{
return "Hello World!";
}
}
}
After building it i´ve created another C# app to use the web service. First i tried it in localhost. The app look like this:

using System;
using System.IO;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Net;

namespace embedFlash
{
public partial class Form1 : Form
{
localhost.Service1 webservice = new localhost.Service1();

public Form1()
{
InitializeComponent();
string result;
result = webservice.HelloWorld();
}

private void Form1_Load(object sender, EventArgs e)
{

}
}
}

Where localhost is a 'Web Reference' with the URL:

http://localhost:1713/Service1.asmx

It worked ok. My next step was to use the service from another PC on the same LAN. In this case the web reference i´ve created is:

http://[IP of the server PC]:1713/Service1.asmx

But when i try this i get an error:

'Cannot establish connection with IP:1713 because it refused it'

...i don´t know what´s wrong...

Tried to ping from one to the other and succesed.
Tried to connect them directly but it didn´t work.
Tried different URL combination but nothing.

Any idea?

Thanks in advance.