Adding Page Numbers to report

Hello,

What I want to do is to add the page numbers to my report.
I know this has been asked before, but I can't seem to get it right.
In PC_Dmis, in the view report mode, I can see the page numbers, and if I report a PDF then the page numbers also printed, but if I want to report in Rich Text Format then the page numbers disappear.
I have checked the code at the bottom of the page, this code is: =Page () + " / " + Pages ()


Why can't I print the page numbers in RTF?

Cheers