Hiding columns of a table - fails from page 2

Hi, I have a table with a repeating header on each page. I'm trying to hide empty columns trailing at right side of the table. The number of empty columns depends on data. I did it with Formcalc script on both header and data row. It works great for first page, but then 'empty' header come back from page 2. If I don't repeat the header on each page, then it works, except I would like to have the header on each page. Anyone found a workaround to this, any thoughts ? Thanks for your help.