Web Services Navigator shows Connection refused: connect

Hi,

When Try to test a Web Servicein Web Services Navigator I am getting below error.This is happening for the standard one also.

url in the screenshot is name space only it would not execute.

The actual url is as below.

http://hostname:50700/portal_UpdateUMEAppWS?wsdl&mode=ws_policy

Any idea how to resolve this?

Thanks,
Mofizur