how show groups header on each page programmatically

Hallo.

I have a repport generarted by a C# programme with 3 grenerated Groups.

all works fine.

but when the details is very long and cause a page break, the groups header don't appears on the new page.

and i want reapeat teh groups header on each page.

i'have tried a lot of things.....

i use VS2008 with CR 2008