i'm stuck alot with spring mvc application with jpa

there is 5 tables with relations
and created the entity class by netbeans 7

and in the jsp page we are using the spring:nested path with the parent table as
and in the jsp a field which point to the another table's column means the entity with other class is comming
when i map by otherclassobj.otherclassPK.neededobj

but the problem when i click on the submit it wont get in to the doSubmitAction of the controller
but when use only one entity relation means the parent class spring:bind its going to controller

i'm very much confused using simple form controller

please help me

do any body help me to see any application with Spring mvc with jpa used mysql

please help me