Screen settings for Appointment

Dear CRM Wizards,

The field "Reference Doc" in the Overview screen of the Appointment is showing "greyed". I want it enabled for entry.

After Checking the applicable role for the same and accessing the BSP WD Workbench, I find that the field is NOT set for being greyed but shows as "Input field" and the "display" check box isn't ticked. But still the field is showing in "display mode" (greyed) on the web page.

I attempt to change the lable for it and the CHANGED label gets to be seen on the screen / page on subsequent log-in but the display settings are not getting changed.

Kindly enlighten where am I going wrong.

Thanks and Regards,

Tariq