#13 Function Search not work

[Anonymous]

Sorry for my english,
This program is beautiful, but one functions not work in my installation.
The problem is in function search, if i type a letters and press enter this is the result:

Warning: Attempt to assign property of non-object in /var/www/rubrica/search.php on line 37

Warning: Cannot modify header information - headers already sent by (output started at /var/www/rubrica/search.php:37) in /var/www/rubrica/search.php on line 114

This is my system configuration.
Apache/2.2.4 (Ubuntu) PHP/5.2.3-1ubuntu6.3

Please help my !
Many thanks Andrea.

tarelli@hotmail.com