php problems solaris 8 apache

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 can stop and start the httpd to get it going again but then it will stop working again.

the access_log file says when I access through safari or explorer on OSX.4

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

[787 byte] By [annib70] at [2007-11-26 10:15:33]