LTPA session cookie for Lotus iNotes & Client termination by loggin off

Hi guys, I am facing following issue and appreciate any support. I created a LTPA session cookie for logging into Lotus Domino using Single Sign On with F5 BIG-IP as reverse proxy. http://per.lausten.dk/blog/2009/06/how-to-create-a-ltpa-session-cookie-for-lotus-domino-using-f5.html I can logon on automatically into iNotes web interface through BigIP by creating LTPA Token and SSO. Everything is working fine, beside off logging off. I am still able to get back to my session by browsing back after successful logged off!!! Please help!! Thx IPSEC