Bon, j'ai fait le mode debug et je reçois ceci :
Internal Server Error
The server encountered an internal error or misconfiguration and was unable to complete your request.
Please contact the server administrator, php4-2@invalid and inform them of the time the error occurred, and anything you might have done that may have caused the error.
More information about this error may be available in the server error log.
Pour la page :
http://www.paroisses-iledurhin.org/modules/piCal/Que pensez vous que ce soit comme problème ? :-o