Zabbix MySQL Access

[matt.b234]

I completed the install of zabbix this morning. It is running on ubuntu 12.04 LTS. It was working for several hours and have not changed any settings. Now I receive the message

mysql_connect(): Access denied for user 'zabbix'@'localhost' (using password: YES) [include/db.inc.php:58]

when accessing the web interface. I have set debug to 4 and still do not see any errors when it is trying to access the database. I can see the startup line where it connects to the database successfully. I can use the credentials to manually access the database and have full permission. I have reconfigured the mysql credentials several times. Why is the web interface incorrectly reporting no db access?

[Heilig]

Check credentials ($DB['DATABASE'], $DB['USER'], $DB['PASSWORD']) in zabbix.conf.php.