Nested objects in Struts

Hi Folks,

I have the following problem, My data model consists of an object(A) that has an ArrayList of another object (B). Object B has an ArrayList of another object (C). I'm displaying the data on the screen in a windows explorer tree like format where the user checks and unchecks the items
(s)he wants to include.
I have no problem displaying the data using the iterate tag where I have 3 iterates. my problem is when the user checks any of the items the values doesn't get submited back to the form.

I tried using nsted tags but it didn't work - I must be doing something wrong - and I pretty much exhaused all that I know. Can anybody shed some light on that? All the example available online address viewing the data but NONE of it mentioned saving it back!!!

Thanks
Einas