Repeating group in dynamic page

Hi everybody,
I try to build a kind of to do list to help people to build house.
My database is composed of steps. Steps are composed of traps to avoid and list of tasks to do.
For each task here will title, cost, deadline, status and descriptions. Each steps have a number of tasks. I have built a dynamic page untitled detail Step where I should have, the title of he step, all the traps to avoid and all the tasks of this step in a repeating group. I can display the title and the traps but not the repeating group and so the tasks titles.
Any idea ?

Thanks a lot for your help.