All services are now based on geolocation, and are specific to the region you are in. If you're in central Europe, you won't get US or UK Netflixs.
montofk, you are correct. You should be getting Netflix in Ireland. All of you, before running off the deepend, you can reset the device back to factory defaults (without resetting your services). And I would also recommend resetting your connection to the router and make sure you are on your network and accessing the internet.
Finally, keep in mind that Netflix in the UK is only available on the WD TV Live Streaming player. Just in case, someone with a hub is reading this.
Also, if you move back into a region that supports Netflix on the device, it should automatically pick up the service and add it to you list of services you will need to reset the device to factory defaults in order for it to pick up Netflix in that region.