backing bean binding problem

In my jsf page, there are three divs each contains several types of JSF controls , then when I submit this page, jump to the onSubmit() method in the pagecode,a strange thing happens , the backingbean can get update of some of the controls while the other controls can't . Could u pls give me some indication?

[317 byte] By [abibia] at [2007-10-3 2:32:42]