Junk Sender Rules

[Ken Burenga]

I have an Outlook rule that reads as follows: "Apply this
rule after the message arrives suspected to be junk e-
mail or from the Junk Sender

• , permanently delete
  it, stop processing more rules."
  
  I routinely add junk senders to the Junk Senders folder.
  
  However, every so often I get the following error
  message: "You don't have prermission to perform this
  operation."
  
  Further after receiving this message my Junk Sender rule
  is turned off.
  
  Can someone explain why this occurs and what I can do to
  get Outlook to delete the junk e-mail and leave my Junk
  Sender rule active.
  
  Thanks,
  Ken Burenga
  (e-mail address removed)