Xmldom.removechild(parent_node,child_node) is not working via UI

Question

I have a proc, in which i have a logic to remove child from the xml node. I have a xml_doc variable pointed to the xml document.
Sample xml to explain my issue better:
<?xml version="1.0" encoding="UTF-8"?>
<oa:stackLayout id="294641" controllerClass="oracle...." textTranslationExpansion="50%"......>
<ui:contents>
<oa:spacer id="_czn1-spacer1_294644" ..../>
<oa:tableLayout id="294645" adminCustomizable="false" width="100%" ....>
<ui:contents>
<oa:rowLayout id="294642" extends="/../../..TextFeature" .../>
<oa:rowLayout id="294643" extends="/../../../IntegerInputWithRangeDisplay" .../>
</ui:contents>
</oa:tableLayout>
</ui:contents>
</oa:stackLayout>
/****************************Code Start************************/
Proc dummy_proc(....)
-- open XML parser
Open_Parser();
l_xmldoc :=parse_JRAD_Document(p_doc_full_name => l_jrad_doc);
// l_xmldoc contains the xml docuement
l_parent_xml_node // Contains the2nd ui:contents node
l_child_xml_node // contains the oa:rowLayout for 294642
dbmsoutput stmts for printing l_xmldoc document - Before removing the node
l_out_xml_node:=xmldom.removeChild(l_parent_xml_node,l_child_xml_node);
dbmsoutput stmts for printing l_xmldoc document - After removing the node
end
/****************************Code End ************************/
Issue :
Scenario 1: When the above proc is called through OAF page submit button, the child node is not getting removed.
Scenario 2: When i run the proc by passing the same values using a anonymous block the child node is getting removed.
Any help is appreciated, why when running the flow the OAF page is stopping the child node to be removed is my question.
Let me know for any specific questions...

Answer 1

How it can be Privilege issue, in both the scenarios same values are getting passed to the procedure. And how xmldom.removechild depends on user priveleges?
Edited by: 870314 on Jul 12, 2011 2:02 AM