RDLC Report Lines repeated on NAV2009R2

hello
NAV2009R2 - Visual Web Developper 2008 (Express)
I'm working on a invoice report (inspired by Report 204)
Lines are in a Table which is in a list as in standard
Item lines are followed by dimension lines that may take more then one line
The problem is :
When the invoice is printed on more than one page and for example at the end of the first page there is not enough place to print :
Item
Dimensionline1
Dimensionline2

It will show at page 1 :
Item
Dimensionline1

and at page 2 :
Item
Dimensionline2

This item is repeated (with the price) and I do not understand what I did that this happens.
because in Report standard 204 there is not this problem.


Property RepeatOnNewPage seems to have no effect
I have find many posts concerning later version of VS but I'm on NAV2009R2 - Visual Web Developper 2008 (Express)

Any help would be nice !