Portal menu portlet performance problems

I need to extract part of the portal page hierarchy for a menu type
portlet (java), but im having difficulties getting acceptable
performance. I use a "select ... connect by prior" to get several levels
of the page hierarchy in one request like this:
select level, id, parentid, title, type, ispublic, description
from portal.wwpob_page$
where subscriber_id = 1 and siteid = 1 and language = 'us' and is_template = 0
and type not in (3,5,6,7,8,9,10,11) and level <= :paramLevels
start with id = :paramStartPageID
connect by prior id = parentid
However im getting a full table scan on wwpob_page$ in the above select and its
taking several seconds. While i have tried many things i havent had any succes
tuning my way out of it. Can some1 help? Oracle execute plan shown below:
SELECT STATEMENT Optimizer Mode=CHOOSE          1 K          6
FILTER
CONNECT BY WITH FILTERING
NESTED LOOPS
INDEX FAST FULL SCAN     PORTAL.CORNERS_PK     1      8      1
TABLE ACCESS BY USER ROWID     PORTAL.WWPOB_PAGE$
HASH JOIN
CONNECT BY PUMP
TABLE ACCESS FULL     PORTAL.WWPOB_PAGE$     1 K     50 K     6

Hi,
We have a Site Indexing Portlet available on the Portal Integration Page. This is a free to download and use portlet. We do ship the sourcecode also along with it. You could try looking at the source-code and see if that would help you.
thanks,
Harsha

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See if the KB [
[1448013 - Connecting to Oracle database. Error; Failed to load database information|http://www.sdn.sap.com/irj/servlet/prt/portal/prtroot/com.sap.km.cm.docs/oss_notes_boj/sdn_oss_boj_bi/sap(bD1lbiZjPTAwMQ==)/bc/bsp/spn/scn_bosap/notes%7B6163636573733d36393736354636443646363436353344333933393338323636393736354637333631373036453646373436353733354636453735364436323635373233443330333033303331333433343338333033313333%7D.do] helps.
Also the following may not hurt to have a look at (if only for ideas):
[1217021 - Err Msg: "Unable to connect invalid log on parameters" using Oracle in VS .NET|http://www.sdn.sap.com/irj/servlet/prt/portal/prtroot/com.sap.km.cm.docs/oss_notes_boj/sdn_oss_boj_bi/sap(bD1lbiZjPTAwMQ==)/bc/bsp/spn/scn_bosap/notes%7B6163636573733d36393736354636443646363436353344333933393338323636393736354637333631373036453646373436353733354636453735364436323635373233443330333033303331333233313337333033323331%7D.do]
[1471508 - Logon error when connecting to Oracle database in a VS .NET application|http://www.sdn.sap.com/irj/servlet/prt/portal/prtroot/com.sap.km.cm.docs/oss_notes_boj/sdn_oss_boj_bi/sap(bD1lbiZjPTAwMQ==)/bc/bsp/spn/scn_bosap/notes%7B6163636573733d36393736354636443646363436353344333933393338323636393736354637333631373036453646373436353733354636453735364436323635373233443330333033303331333433373331333533303338%7D.do]
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Follow us on Twitter http://twitter.com/SAPCRNetSup

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