How print first detail.1 then detail.2

Hi,

i would like to print as below:
Detail.1:
aa aa aa aa
bb bb bb bb

detail.2:
11 11 11 11
22 22 22 22

currently my report appear to be like below:
aa aa aa aa
11 11 11 11
bb bb bb bb
22 22 22 22

i tried to do page break, but it is still same. just print at new page.
i've no idea how to group it and print it in group.

your advice is really much appreciated. tq.