Oh my, no wonder it wasn't working! You're right: I foolishly assumed my port forwarding had worked. These are the settings I have:
Firewall Entry Type: IPv4 Port Mapping
Public UDP Ports: 8888
Public TCP Ports: 8888
Private IP Address: XXX.XXX.1.7
Private UDP Ports: 8888
Private TCP Ports: 8888
Does that look right to you? I'm not sure what I've done incorrectly, and I really would appreciate your help. I'm an avid reader, and not being able to access my library is driving me around the bend!
Thanks so very much!