rich:suggestionbox is not rendering the response

Question

I am using <rich:suggestionbox>. It is not even showing any errors nor showing the suggestions
The following is my code
<h:panelGrid columns="1">
<h:inputText id="reg" value="#{valuesController.value.data}" />
<a4j:region renderRegionOnly="true">
     <rich:suggestionbox id="regid" for="reg"
suggestionAction="#{valueController.getValues}"
var="svalues"
          height="300" width="300">
          <h:column>
               <h:outputText value="#{svalues}" />
          </h:column>
     </rich:suggestionbox>
</a4j:region>
</h:panelGrid>
valueController.getvalues(Object) : returns a list of strings
Any idea plzz?

Answer 1

Oracle Security patches applied to Oracle-Application-Server-10g/10.1.3.5.0 .
APEX version is Application Express 4.0.1.00.03
The APEX application after the patch was applied on OAS was raising Error (Getting Http-400 Bad Name In The Request: Not A Legal Plsql Identifier ).
Implemented metalink Doc ID 1327343.1 to resolve this error.
Created a new procedure without parameters which calls the original procedure using parameters. Changed the DAD.conf to reflect the new Procedure
for the variable PlsqlDefaultPage instead of the format PlsqlDefaultPage f?p=AppID:PageID.
Apparently, there is this custom login screen which is called On-Load before Header on the Default Page 71 like this. And instead of rendering page 71 gives out the error.
begin
if app_security_pkg.is_user_authenticated(null,null)
then
wwv_flow_custom_auth_std.login( p_uname => v('APP_USER_NAME')
, p_password => null
, p_session_id => v('APP_SESSION')
, p_flow_page => :app_id||':71'
end if;
exception
when others then
dbms_output.put_line(sqlcode);
end;