Keep losing Yahoo home page

My personal Yahoo home page reverts to the default Yahoo page every time I reopen my Firefox 2.0.0.3, and yes, I have http://my.yahoo.com/ as my home page in Tools/Options. Can anyone help?
Alice

 

Yahoo ....
What does "Keep me signed in" mean?

Yahoo! ID and Password (FAQ)

Global site rules ...
Maximum auto-log allowance - 2 weeks (must tick option).
Some features will require you to log in again (example credit card use) if auto-login allowed site admission.

What will change / defeat above rules ...
Yahoo has a option in user profile which allows user to force more frequent login, even when two week box is checked.
Signing / logging out of site will force re-login.
Not allowing cookies to be placed. This can be caused by a FF setting OR extension settings. Additionally any 3rd party program which deletes cookies when run.
Corrupted cookies. If this is a problem, delete all yahoo cookies and let site install new cookies. Be sure your preferred options are in place when you leave the site.

 

Thank you, DennisL

Thank you, DennisL. You said the magic word when you mentioned cookies. Tech Help at Comcast had me choose the option in Firefox to clear all cookies, passwords, cache, almost everything every time I closed my browser --- and I had forgotten to go back and reverse that option. I've done that now, and everything is working just fine. Thank you.
Alice

 

You welcome.