HTTP Status 408 in Tomcat 5.5.9

Hi, everyone
I am playing with Tomcat 5.5.9 and Hibernate. I ran into a strange problem and couldn't figure it out.
Say Tomcat is running on machine (Pine). I can access protected page by http://localhost:8080/hi/protected/listMsg.do. I can get messge list after I login. But when I tried to access the protected page from other machine (like Maple) by http://pine:8080/hi/protected/listMsg.do and submit login form, then I got error message (reponse page) like
HTTP Status 408 - The time allowed for the login process has been exceeded. If you wish to continue you must either click back twice and re-click the link you requested or close and re-open your browser

type Status report

message The time allowed for the login process has been exceeded. If you wish to continue you must either click back twice and re-click the link you requested or close and re-open your browser

description The client did not produce a request within the time that the server was prepared to wait (The time allowed for the login process has been exceeded. If you wish to continue you must either click back twice and re-click the link you requested or close and re-open your browser).

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Apache Tomcat/5.5.9

Did anyone have any clue on this issue?
Thanks

Y.ping
[ July 13, 2005: Message edited by: Yongping Wang ]

Finally solved.
Actually it is caused by privacy settings in Web browser. In this case, it is about cookie setting. Letting current web browser accepts cookie makes the problem gone.