Unable to enter an address in the USA

I received the SD card. It is well recognized in my Nuvi 255W and I even entire mapping. So what is the problem?
No way to enter an address in the US or CANADA since these countries are not included in the list of countries when we do "Address" / "Change country".
I have contacted the Garmin support. They told me to select a city only. It works, but you can reach the city center! Still no way to enter an address.