Unable to access the Values From the UI

Hello Experts

I need to access the Values from the UI, Which are decalred as Node Element in BO defination, i need to write some bussiness logic in Before-Save event using those UI values, When i tried to access the values using "this" operator also values are not comming into Middle Layer.Please help me.

My BO derfination in like dat.

root{

element1

element2

     node1{

               element 1

               element 2

            }

    node2{
            element 1

             element2

}

}

I want acces the element1 of node1 values in the Middle layer.

Thanks and Regards

------------------------------

Ravikumar H.R