Unable to activate UI theme designer

Hi All,

Currently we are on  portal 7.40 sp11 and I have followed the below steops to activate the UI Theme Designer but I am unable to see them .

1. In SAP NetWeaver Administrator, navigate to:  Configuration  Infrastructure  Application Modules .
2. Filter the Application List. In the Name field, type laf, and then press Enter.
3. Scroll to the Portal Service Details section, and in the Portal Services tab, choose Portal Service Configuration.
4. To activate UI Theme Designer and deactivate the Theme Editor, change the value of the Determine what will be the theme runtime provider property to LESS and choose Save.
5. Restart the portal service.

Is anything else needs to be done? Any other things to try?

Thanks,

Arun