[Zope] Zope Team(support required)

[mallavaram satishreddy]

Hi ZopeTeam,

      We are using zope. We are facing one problem. Whenever we 
want to logoff from the zope user interface, I have choosed 
"logout" option and clicked the "Go" button in top of frame then 
it is showing username and password window. Why it is showing 
username and password window again?.
Once i click the "OK" button it is logging off. So, anybody is 
give a solution "How to avoid a username, password window whenever 
we logging off?".

Regards,
M. Satish