Web dynpro UI element visibility

Hi
My situation is this.
I have a view on which I want to display certain fields to the user depending on whether a particular value is present in a database table.
In the Context I have attributes of type WDUI_VISIBILITY which are mapped to the relevant UI elements in the layout that I want to set to visible or not when the view loads.
In the WDDOINIT method I have declared local variables like so: DATA lv_visible TYPE wd_this->element_properties-visible.
I then perform the database check which I can see is fine in debugging and assign values to my local variables:
IF lv_unfal NE 'X'.
       lv_visible = 02.
      lv_hod_visible = 01.
     ELSE.
       lv_visible = 01.
      lv_hod_visible = 02.
And then assign those values to the context element.
     lo_el_properties->set_attribute( name = 'VISIBLE' value = lv_visible ).
    lo_el_properties->set_attribute( name = 'HOD_VISIBLE' value = lv_hod_visible ).
    lo_el_properties->set_attribute( name = 'HOD' value = lv_hod_vis ).
However on loading the view not all of the UI elements are being made visible/invisible as I would expect/hope! I am missing something here? I've used this concept before and it worked ok. Is is something to do with the WDDOINIT method?
As always very grateful for any suggestions.
Thanks
Jon

Hi Rama
Can you elaborate on how by default the the ui elements are not visible please?
I've double checked all the assignments and I have bound the visibility attribute to all required UI element's Visible Property.
There are no other methods with code that is overwriting the INIT method. One of the elements involved is a checkbox which has an onToggle event. I'm not interacting or setting it on loading the view but might that have an effect?
Cheers
Jon

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