Slim Application Error

The application could not run because of the following error:

Details

Type: PDOException
Code: 2005
Message: SQLSTATE[HY000] [2005] Unknown MySQL server host 'mysql51-69.pro' (0)
File: /home/sautons/app/Controllers/Mypdo.php
Line: 23

Trace

#0 /home/sautons/app/Controllers/Mypdo.php(23): PDO->__construct('mysql:host=mysq...', 'sautonspara', 'VtSCaA33P', Array)
#1 /home/sautons/app/Models/Produit.php(48): Controllers\Mypdo::getInstance()
#2 /home/sautons/app/Controllers/Infos.php(6): Models\Produit::getListeProduits()
#3 /home/sautons/app/Routes/Front.php(44): Controllers\Infos->__construct()
#4 [internal function]: {closure}()
#5 /home/sautons/app/Slim/Route.php(454): call_user_func_array(Object(Closure), Array)
#6 /home/sautons/app/Slim/Slim.php(1316): Slim\Route->dispatch()
#7 /home/sautons/app/Slim/Middleware/Flash.php(85): Slim\Slim->call()
#8 /home/sautons/app/Slim/Middleware/MethodOverride.php(92): Slim\Middleware\Flash->call()
#9 /home/sautons/app/Slim/Middleware/PrettyExceptions.php(67): Slim\Middleware\MethodOverride->call()
#10 /home/sautons/app/Slim/Slim.php(1263): Slim\Middleware\PrettyExceptions->call()
#11 /home/sautons/www/index.php(18): Slim\Slim->run()
#12 {main}