I have a Popup LOV as Item Code and it have its corresponding Additional outputs which works perfectly fine.

Now, the problem arises when I dynamically set the value of Item Code : In that case these additional outputs does not fire.
var ret = $v("P201_PRV_ITEM");
var disp = $v("P201_DISP_ITEM");
apex.item("P201_ITEM_CODE_C").setValue(ret,disp);
@inol please help