I have a Macbook Pro and it is been installed with Mac OS X. I have installed iCal application and it has two calendars. One is Google and other is Kerio. My Google Calendar alarms for set appointments whereas my Kerio is not able to work or does it alarm. i do not know why is this happening? What could have caused it to function in such way. Please help me out so that I can make the things to work and execute.