Error "The Siebel Server Communications applet is required in order to run this application. Please close the browser and login using a new browser window."

If you get an error "The Siebel Server Communications applet is required in order to run this application. Please close the browser and login using a new browser window." while starting up the Siebel Client ( e.g. Siebel Call Center), you can resolve the problem by following steps mentioned below: