To register a .ie domain you must be able to outline a current Business connection to Ireland. If registering a .ie domain from outside Ireland, it must be for Business use and not Personal use. The IEDR will look for a connection with Ireland, for example a copy of an Invoice from your Business to an Irish address.
If you require further assistance with this, please open a ticket with LetsHost New Domain Registrations. Our Domains team will be able to assist you further.