ho installato e tradotto opencart v1.5.2.1 ( Fantastico Script)

mi appare questo errore:
Warning: curl_exec() has been disabled for security reasons in /home/admin/miosito.com/admin/model/localisation/currency.php on line 123Warning: Cannot modify header information - headers already sent by (output started at /home/admin/miosito.com/admin/index.php:79) in /home/admin/miosito.com/system/engine/controller.php on line 28Warning: Cannot modify header information - headers already sent by (output started at /home/admin/miosito.com/admin/index.php:79) in /home/admin/miosito.com/system/engine/controller.php on line 29
Se faccio il refresh della pagina rimane il messaggio, mentre se clicco indietro il messagiio mi dice:
Hai modificato con successo le impostazioni! E le impostazioi vengono salvate.
Grazie.