If your hosting Guile's Underworld, you need to know, your server isn't reseting, and it's booting everyone that enters the module, you need to open up the script "time_keeper" and adjust the settings, becuase your obviously not using NWNX2, which means you should either reload the module (Preferrably) or restart it using the default BIOWARE restart method (not recommended).
I just thought I'd give you the heads up, because you had a lot of players on today, but they couldn't come back to play.
(myself included)