IIS problem

[Humble Bee]

Server Application Error
The server has encountered an error while loading an application during the processing of your request. Please refer to the event log for more detail information. Please contact the server administrator for assistance.


what does that error mean ? yesterday it worked fine.
Thanks

[PeejAvery]

This belongs in the Windows OS Issues forum. Please ask Dr. Script to move it there.

Concerning this problem, what were the recent changes between the day it ran and when it did not? What overnight tasks were scheduled? What network activity was there?