Second LOV data depend on selected data of first LOV

Hi, first of all, I must say that I am new to Apex.

In my page, I have two elements (type Popup LOV): P2_APP and P2_MOD and I created two LOVs for each item. What I want is that when I select a value in the first LOV LOV in second I get data value select first LOV.

My logic of table in the database is correct, and some States are good.

I think that the select statement in the second LOV is not extract data from the first element of the LOV:

Select nom_mod as display_value, MOD_CODE as return_value
mods
When the APPLICATION = *: P2_APP * <-this is the first LOV element with the data previously selected
order by 1

What I am doing wrong?

Thanks in advance.

Did you follow that? http://docs.Oracle.com/CD/E23903_01/doc/doc.41/e21674/bldapp_item.htm#HTMDB05014

If it does not help to return...

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