[horde] Access denied for gollem in /usr/bin/horde-alarms

Sat Feb 15 13:20:15 UTC 2014

Hi,

in /var/log/messages, I get 

Feb 15 14:10:01 krypton /USR/SBIN/CRON[22149]: (root) CMD (/usr/bin/horde-alarms)
Feb 15 14:10:05 krypton HORDE: [gollem] PHP ERROR: mysqli::mysqli():(28000/1045): Access denied for user 'horde'@'localhost' (using password: NO) [pid 22149 on line 136 of "/usr/share/php5/PEAR/Horde/Db/Adapter/Mysqli.php"]

every 5 minutes. what could be causing this?