DropDownMenu Plug in not working with list query

Hi,
I installed Tab-Menu COM.JWILSON.APEX.DROP_MENU.
I created a region for that plug in using the following query
select LIST_ENTRY_ID ID
,LIST_ENTRY_PARENT_ID pid
,ENTRY_TEXT name
,entry_target link,level
from APEX_APPLICATION_LIST_ENTRIES
where list_name ='Nav'
and application_id =:APP_ID
start with list_entry_parent_id is null
connect by prior list_entry_id = list_entry_parent_id
It is creating the Tab Menus but if I click on any of the tabs or tab menus it is throwing following error
Bad Request
The request could not be understood by server due to malformed syntax.
When i checked the url it is showing http://apex.oracle.com/pls/apex/f?p=&APP_ID.:8:&SESSION.::&DEBUG.::::
I think the plug in is not substituting the APP_ID, SESSION and DEBUG session items.
Please help.
Thanks,
Mehabub

Gurus,
Any idea??
Thanks,
Mehabub

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