IW52- Reference Date - to make non editable

Dear all,

I want to make the Completion date( reference date & time) non editable while clicking on completion flag.

I searched through SCN & I've done the following settings according to that.

I have tried through SPRO Configuration. But it is not reflecting in IW51/52. The fields are still editable even the configuration is done.

I tried with Set screen templates for notification type. But i did not find any screen areas related to reference date and time.

Kindly suggest to do the above requirement.

Waiting for the reply.

Regards,

Dhivya N.