Hi Venkatesh
Hope this helps, after installing the Emma Flash tool, copy the customization.ini file from the unzipped folder (its a notepad and contains “developerworld/enable = true” when opened)
After that copied follow this steps, Computer >Local disk C > Program Files >Sony Mobile >Emma> “Paste the copied customization.ini file here” authorise the changes with “Yes” when requested. Now close the folder.
Now start Emma by clicking Start > All programs > Sony Mobile > Emma > Emma. It should open without prompting log.