How can I log in without typing my password every time?

Using Firefox 1.5, and have set it to allow cookeis from this site. But when I log out this board says "All cookies cleared!" Where is the option to not clear?

I don't have to type my password to log into any other boards I use.

I figured that the "remember me" checkbox might do something, but apparently not.

Too many passwords to remember here in the 21st century - PITA!

TIA
Jon