pda connection with web service

Question

Hello everybody!
I have been developing for a while a pda application in visual studio 2005 using a web service. The error i'm facing is that when i try to invoke the service i'm getting a message that says "Network connection cannot be established" (i guess with the web service). That sound weird to me because the server and the connection is virtual so ...what could go wrong?? Do i have to do anything else except for adding the service to my project just as a web reference? The code i'm using is :

try
            {
        // this is the service that is a web reference in my project
PDAApp.MyService.Service serve =new PDAApp.MyService.Service();

// i invoke the getTitle(int id) method from the service. This is the //spot that i get the WebException "Connection cannot be established"

                String title = serve.getTitle(int.Parse(textBox1.Text));
                textBox2.Text = title;
                MessageBox.Show("Service completed");
            }

//Exceptions
            catch (WebException ex)
            {

                if (ex.Status == WebExceptionStatus.ProtocolError)
                {
                    Console.WriteLine("Status Code : {0}", ((HttpWebResponse)ex.Response).StatusCode);
                    Console.WriteLine("Status Description : {0}", ((HttpWebResponse)ex.Response).StatusDescription);
                }

//this is the line that is activated when the exception rises
                MessageBox.Show(ex.Message);
            }
            catch (FileNotFoundException exc)
            {
                MessageBox.Show(exc.Message);
            }
            catch (System.Net.Sockets.SocketException se)
            {
                MessageBox.Show(se.Message);
            }
            catch (System.Web.Services.Protocols.SoapException soape)
            {
                MessageBox.Show(soape.Message);
            }

Any help would be appreciated...Thank you in advance for reading my post..

vanalex