Weird. All I can recall is that there's a bunch of other extensions that need to be active as well, to do with USB mass storage (I assume you're connecting a drive?) - check and see if they're all installed.

Your other alternative would be to start from the Greek localised install, and use Software Update to get you up to 9.2.2 - but that might be taxing on your download allowance or bandwidth if that's a factor where you are.