Problem formatting total number of pages

Hi all,
BI Publisher 11.1.1.6

I'm trying to do the following:

- the first section of the report contains a (dynamically generated) table of contents (TOC)
- page-numbers of the TOC should be displayed as roman numerals
- page-numbers after the TOC ("main section") should start with 1 and should be displayed as arabic numerals

So the first page of a 3-page TOC should display:
[code]
I/III
[/code]

And the first page after the TOC should display something like:
[code]
1/12
[/code]

But it seems that formatting the total number of pages only works for the whole report while
formatting the page-numbers works for individual sections: