Safe_mode - set_time_limit()

[cnit]

When I press "dig this" to index, I have this response
Warning: set_time_limit(): Cannot set time limit in safe mode in /www/docs/equipamientosfox.com/public_html/buscador/admin/spider.php on line 16

And It indexes only the index site.

When I press "update sites", I have this response
Warning: set_time_limit(): Cannot set time limit in safe mode in /www/docs/equipamientosfox.com/public_html/buscador/admin/limit_upd.php on line 23

When I press "statictis", I have this response
Warning: set_time_limit(): Cannot set time limit in safe mode in /www/docs/equipamientosfox.com/public_html/buscador/admin/statistics.php on line 19

Note: my web server have this configuration:
safe_mode=on
allow_url_fopen=on

Thanks (sorry about my english)
CNIT

[boyd]

http://www.phpdig.net/navigation.php?action=doc

section 2.6

"Because of the time consuming indexing process, PHP must not be safe_mode configured and the server that performs the index must not timeout. "