HI June,
Could you please confirm what settings you have under "BoxMonitor.Channels"
To check please nagivate to click on System>Servers>Overview>Detection Server Detail>- Advanced Server Settings
Make sure that you have exactly BoxMonitor.Channels = Packet Capture, Copy Rule
Anything other than that drop folder wont work for example BoxMonitor.Channels = Inline SMTP
Hope this will resolve your issue