I have a problem with the folder assistance in public folder . I have added
rule in my folder assistance to alert the users whenever there is a new
posting in the Public Folder.


I have lots of sub-folders under the Top level folder and all the folders
are added with rules to alert users whenever a posting is made (Note: all
the rules is the same in all sub-folders) . Sometimes, the folder assistance
rules work but at times the rules don't work. When I click on the rules on
that folder that don't work (the rule is in a red cross status and no alert
is sent to the users when a posting is made). When I edit the rule again,
the rule work.

What could be the possible problem caused by this?

Thanks you for your help.