connected to mysql server failed

[speedlight]

I don't started my zabbix server caus my database zabbix don't connected

Action
/etc/zabbix/zabbix_server.conf

grep DB zabbix_server.conf
### Option: DBHost
DBHost=localhost
### Option: DBName
# For SQLite3 path to database file must be provided. DBUser and DBPassword are ignored.
# Sample SQLite3 DBName:
# DBName=/var/lib/zabbix/zabbix.sqlite3
# DBName=
DBName=zabbix
### Option: DBSchema
# Schema name. Used for IBM DB2.
# DBSchema=
### Option: DBUser
# DBUser=
DBUser=zabbix
### Option: DBPassword
# DBPassword=
### Option: DBSocket
# DBSocket=/tmp/mysql.sock
### Option: DBPort
# DBPort=3306
### Option: StartDBSyncers
# Number of pre-forked instances of DB Syncers
# StartDBSyncers=4


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mysql -u root -p

grant all privileges on zabbix.* to zabbix@localhost identified by 'zabbix';


tail -50 /var/log/zabbix-server/zabbix_server.log
[Z3001] connection to database 'zabbix' failed: [1045] Access denied for user 'zabbix'@'localhost' (using password: NO)



Thank you for your help me