Lol.
Seriously though, normally when there's an issue with some system a message will be logged to WeatherCat's log window - always worth checking there for information (Tools menu->Log).
Alternatively, the Status window (Tools->Status) will show the last known status of:
FTP, Wunderground, Custom CGI, CWOP, Custom Web, simple web, webcam, station comms and the internal watchdog.