Its you internet settings so delete them and reset them, nothing to do with Aer Lingus. It may also be this way because when people buy new computers they don't take much care when setting it up and allow the system to be based on the US or UK versions and don't pick the Irish one.
It works correctly for 99% of people so change your settings if you can or get someone else to do it.
Last edited by EI-A330-300; 24th May 2013 at 20:00.