A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond

Hi All,
 I have created a FTP client in ASP.net and it's working fine on
my local system but when i deployed this code on Public IP(Remote
server) it's not working.Code and Exceptions message are give below.

 
public void Login()
{
if ( this.loggedin ) this.Close();

Debug.WriteLine("Opening connection to " + this.server, "FtpClient" );

IPAddress addr = null;
IPEndPoint ep = null;

try
{
this.clientSocket = new Socket( AddressFamily.InterNetwork, SocketType.Stre ...