SOS,something wrong in my Events

Hello everyone:

There are something wrong in the Events Home page and Events Calendar on my web site,just these two pages.I have tried to re-install this module，but i still can't open these pages.

this is my website :www.goloum.com

maybe your error reporting is off in php.ini settings. Check that in admin panel -> host info -> php info -> search for error_reporting. Enable it if its disabled.

EDIT: oh and try looking in error log too.

 I find this in my error log :

[Sat Apr 13 12:14:24 2013] [error]     PHP Fatal error:  Call to undefined function cal_days_in_month() in /www/web/goloum/public_html/modules/boonex/events/classes/BxEventsDb.php on line 52, referer: http://www.goloum.com/index.php

 I added "extension =" calendar.so "" in php.ini, it works great now

thanks