My b2evolution Version: 1.9.x

mysql version : 4.1.11-Debian_4sarge7
php version :4.4.0
b2evo 1.9.2

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I get this error in the admin page

Notice: Only variable references should be returned by reference in /home/www/hardblogcafe.freehostia.com/inc/MODEL/dataobjects/_dataobjectcache.class.php on line 121

Notice: Only variable references should be returned by reference in /home/www/hardblogcafe.freehostia.com/inc/MODEL/dataobjects/_dataobjectcache.class.php on line 121

Notice: Only variable references should be returned by reference in /home/www/hardblogcafe.freehostia.com/inc/MODEL/dataobjects/_dataobjectcache.class.php on line 121

Notice: Only variable references should be returned by reference in /home/www/hardblogcafe.freehostia.com/inc/MODEL/dataobjects/_dataobjectcache.class.php on line 121

Notice: Only variable references should be returned by reference in /home/www/hardblogcafe.freehostia.com/inc/MODEL/dataobjects/_dataobjectcache.class.php on line 121

Notice: Only variable references should be returned by reference in /home/www/hardblogcafe.freehostia.com/inc/MODEL/dataobjects/_dataobjectcache.class.php on line 121

Notice: Only variable references should be returned by reference in /home/www/hardblogcafe.freehostia.com/inc/MODEL/dataobjects/_dataobjectcache.class.php on line 121

Notice: Only variable references should be returned by reference in /home/www/hardblogcafe.freehostia.com/inc/MODEL/dataobjects/_dataobjectcache.class.php on line 121

Notice: Only variable references should be returned by reference in /home/www/hardblogcafe.freehostia.com/inc/MODEL/dataobjects/_dataobjectcache.class.php on line 121

Warning: Cannot modify header information - headers already sent by (output started at /home/www/hardblogcafe.freehostia.com/inc/MODEL/dataobjects/_dataobjectcache.class.php:121) in /home/www/hardblogcafe.freehostia.com/inc/VIEW/_menutop.php on line 39

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This errors in the blog:

Notice: Only variable references should be returned by reference in /home/www/hardblogcafe.freehostia.com/inc/MODEL/dataobjects/_dataobjectcache.class.php on line 121

Notice: Only variable references should be returned by reference in /home/www/hardblogcafe.freehostia.com/inc/MODEL/dataobjects/_dataobjectcache.class.php on line 121

Notice: Only variable references should be returned by reference in /home/www/hardblogcafe.freehostia.com/inc/MODEL/dataobjects/_dataobjectcache.class.php on line 121

Notice: Only variable references should be returned by reference in /home/www/hardblogcafe.freehostia.com/inc/MODEL/dataobjects/_dataobjectcache.class.php on line 121

Notice: Only variable references should be returned by reference in /home/www/hardblogcafe.freehostia.com/inc/MODEL/dataobjects/_dataobjectcache.class.php on line 121

Notice: Only variable references should be returned by reference in /home/www/hardblogcafe.freehostia.com/inc/MODEL/dataobjects/_dataobjectcache.class.php on line 121

Warning: Cannot modify header information - headers already sent by (output started at /home/www/hardblogcafe.freehostia.com/inc/MODEL/dataobjects/_dataobjectcache.class.php:121) in /home/www/hardblogcafe.freehostia.com/inc/MODEL/skins/_skin.funcs.php on line 71

Notice: Only variable references should be returned by reference in /home/www/hardblogcafe.freehostia.com/inc/MODEL/dataobjects/_dataobjectcache.class.php on line 121

Notice: Only variable references should be returned by reference in /home/www/hardblogcafe.freehostia.com/inc/MODEL/dataobjects/_dataobjectcache.class.php on line 121

Notice: Only variable references should be returned by reference in /home/www/hardblogcafe.freehostia.com/inc/MODEL/dataobjects/_dataobjectcache.class.php on line 121