Unknown MySQL server host 'mysql5-20' (1)/captcha/png/8HON17LL9CWO1IEWOBAU
  (1024) Can't connect to MySQL server   Database.php   line 68     17-12-17   13:00
FrontController->dispatch() # line   18, file: /home/arfooo/www/index.php
  call_user_func_array(Array[2], Array[1]) # line  211, file: /home/arfooo/www/core/FrontController.php
    CaptchaController->pngAction("8HON17LL9CWO1IEWOBAU") # line    0, file: unknown
      Model->find(Object:Criteria) # line   46, file: /home/arfooo/www/controllers/CaptchaController.php
        Database->sqlGetRow("SELECT * FROM News_captchacodes WHERE publicCode = '8HON17LL9CWO...") # line   92, file: /home/arfooo/www/core/Model.php
          Database->sqlQuery("SELECT * FROM News_captchacodes WHERE publicCode = '8HON17LL9CWO...") # line  330, file: /home/arfooo/www/core/Database.php
            Database->connect() # line  210, file: /home/arfooo/www/core/Database.php
              trigger_error("<b>Can't connect to MySQL server</b></b>") # line   68, file: /home/arfooo/www/core/Database.php