Disable send report by email.

[cognoslearner1]

Hello All,

I am struggling to disable the email option through advanced options.
In the 'Run with advanced options' screen:
I have eliminated text by following below text.
C10/templates/ps/messages/portal_en.xml file for the entry:
     <string id="IDS_OTHERRUN_DELIVERY_REPORT" usage="checkbox label"></string> 
   <string id="IDS_OTHERRUN_DELIVERY_REPORTS" usage="checkbox label"></string>

After implimenting above steps I was able to remove text.
However I am still able to see checkbox. Please advise me how to disable/hide checkbox from here  ?

many thanks,
Cognoslearner1