Errornya disebabkan mysql servernya tidak online, so login tidak bisa diautentikasi.
Mysql server gak jalan disebabkan beberapa hal, paling mudah Anda telusuri di mysql.log-nya
ini contohnya:
110104 9:20:21 [Note] Plugin 'FEDERATED' is disabled.
wampmysqld: File '.\mysql\plugin.MYD' not found (Errcode: 2)
wampmysqld: Can't find file: 'plugin' (errno: 2)
110104 9:20:21 [ERROR] Can't open the mysql.plugin table. Please run mysql_upgrade to create it.
110104 9:20:37 InnoDB: Started; log sequence number 0 15066133
110104 9:20:37 [Warning] Can't open and lock time zone table: File '.\mysql\time_zone_leap_second.MYD' not found (Errcode: 2) trying to live without them
110104 9:20:37 [ERROR] Can't open and lock privilege tables: File '.\mysql\servers.MYD' not found (Errcode: 2)
110104 9:20:37 [ERROR] Can't open the mysql.func table. Please run mysql_upgrade to create it.
110104 9:20:37 [ERROR] Cannot open mysql.event
Solusi termudah, install lagi mysqlnya atau kalau pakai paket semacam WAMP, XAMPP, dll, install paket tersebut.
Umumnya, database gak akan dihapus atau ditimpa sama sistem baru, kecuali database mysql.
