web browser shows blank page when accessing *.php file

We are publishing an ical calendar from a mac on a webserver running apache on solaris 8. However, its suddenly stopped working via webrowser. I have tried to stop and start the httpd to get it going again but to no avail. when I access through safari or explorer on OSX.4 the access_log file says mac-abarnes.fmri.columbia.edu - abarnes [19/Sep/2006:15:51:47 -0400] "GET / HTTP/1.1" 302 5 mac-abarnes.fmri.columbia.edu - abarnes [19/Sep/2006:15:52:47 -0400] "GET /week.php HTTP/1.1" 200 5 and the error_log file says [Tue Sep 19 15:53:57 2006] [error] PHP Fatal error: Maximum execution time of 60 seconds exceeded in /websites/ical/functions/ical_parser.php on line 494 Not quite sure where to go from here. thanks Anna http://ical.fmri.columbia.edu/week.php