I have shared a calendar from one user's computer to 12 other computers in my office using the ICalendar format. The calendar saves to a second computer that acts as a "server" for the .ICS calendar file. The problem is that several of the computers fail to update while several others update just fine. When I "surf" to the calendar on the computer where it is stored and click on the file, it adds a new calendar to that computer and everything is fine for a while. Does anyone have any idea what's going on and how I can fix it? Thanks in advance.