Status Reason Column is Missing in Activities Report

Hi,

I added 'Status Reason' field in the 'Task' form. Published it. The field is properly appearing in the Task form.

Challenge:

I created a report for certain type of tasks to show which tasks are in-progress, on-hold, deferred, etc.  Now I am trying to add this 'Status Reason' in the report but it is not appearing in the 'Add Column' list of report wizard.

What I am missing?  Please advise.

We are using Dynamics CRM Online.

Thanks in advance.

Saima Munir