Client-Server problem: sending udp packets to server causes "an existing connection was focibly closed by the remote host"

[Bigdave]

hi

Ive recently started coding a small project in c# using microsofts 2005
beta, i am trying to setup a small application that will send a string to a
server via udp, then for that same app to listen for a response from the
server and write the response into a message box, but when testing this on
the loopback address (127.0.0.1) i recieve "an existing connection was
focibly closed by the remote host", i have wrote the following code:

private void test_butt_Click (object sender, EventArgs e)
{
string ip = ip_txt.Text;
try
{
UdpClient udp = new UdpClient();
udp.Connect(ip, 29119);
Byte[] sendBytes = Encoding.ASCII. GetBytes("Is anybody
there?");
udp.Send(sendBy tes, sendBytes.Lengt h);

System.Net.IPEn dPoint RemoteIpEndPoin t = new
System.Net.IPEn dPoint(System.N et.IPAddress.An y, 0);

Byte[] receiveBytes = udp.Receive(ref RemoteIpEndPoin t);
string returnData = Encoding.ASCII. GetString(recei veBytes);

MessageBox.Show (returnData.ToS tring());
udp.Close();
}
catch (Exception problemo ) {
MessageBox.Show (problemo.Messa ge);
}
}
any help would be much appreciated

Thanks

--Dave