have you checked the admin log?
what if the files that get written when you make the changes don't have the appropiate permissions?

They're at /opt/otrs/Kernel/Config/

On 27 May 2010 15:35, Jason B. Loven <jloven@caisoft.com> wrote:

When I make a change to the Calendar working hours for Calendar 1 and hit apply the screen refreshes like it did something but the working hours are back to the original settings. Anyone have any suggestions?