RDLC report: How to keep group on same page

Hi,

Here's my problem: I created a custom report. In the Layout I added a tablix with group.
The purpose of this tablix is to display quote's information:
The table group 1 displays the name of a service and the tablix lines display the differents Service:

Service1
Subservice 1
Subservice 2
Service 2
Subservice 1
Subservice 2

The problem is if there is to much lines in a service, this lines are splits in to pages:

Service1
Subservice 1
Subservice 2
Service 2
Subservice 1

---

Page break

---

Subservice 2

I would like the hole service to be display on the second page in such case.

I try to set the "keep together" function of the table to TRUE but nothing change.

Thanks for the help;
Ark@