[PythonReports-users] Alternate line background

Hi,

Another question, I like to have every alternate detail line with a 
different background, to help reading the report.

I copied "Style 23" on the detail band in sakila.prt, i.e. setting a 
bgcolor of my choice and in when I have "PAGE_COUNT % 2", I also tried 
with "ITEM_NUMBER % 2".

But neither in Preview nor when Printing is my bgcolor showing.

Is there something else I need to set?

Werner