[Python] Python SocketServer works on localhost but not on server

Included below is the code that I am currently using:

#! /usr/bin/python
print 'Content-type: application'
print '\n\n'

import SocketServer
import cgitb
cgitb.enable()

class MyTCPHandler(SocketServer.BaseRequestHandler):
"""
The RequestHandler class for our server.

It is instantiated once per connection to the server, and must
override the handle() method to implement communication to the
client.
"""

def handle(self):
# self.request is the TCP socket connected to the client
self.data = self.request.recv(1024).strip()
print "{} wrote:".format(self.client_address[0])
print self.data
# just send back the same data, but upper-cased
self.request.sendall(self.data.upper())
self.request.sendall('Data Received')

if __name__ == "__main__":
HOST, PORT = "localhost", 9989

# Create the server, binding to localhost on port 9989
server = SocketServer.TCPServer((HOST, PORT), MyTCPHandler)

# Activate the server; this will keep running until you
# interrupt the program with Ctrl-C
server.serve_forever()


The code works as expected on localhost, but is unresponsive on public server.

In addition, executing the code twice results in the following error message:

error: (98, 'Address already in use')
​

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