Turning off Norton 360 Firewall

I am trying to turn off the Norton 360 firewall in order to use a Windows Media Center Extender. I go into “Manage Firewall” and turn it off.  When it asks me when “How long should the firewall remain turned off”  I scroll to “until I turn it back on” then hit “OK”.  The firewall turns off, but after awhile  (within 24 hours) at a seemingly random time, the firewall turns itself back on.  This happens without reset of the computer.  Short of removing the program (which I am very close to doing) how do I keep this permanently OFF.