Hi Maureen. My name is***** you for your question and the opportunity to assist.
After tapping Menu>Settings>Wi-Fi Networks and tapping your wi-fi network
you would enter Network key 64270A2C63
This is a case sensitive entry. Also the 0 to the left of the A is zero and not the letter o.
Hi Maureen. I don't know what registration application you're talking about but you mention a "network key"
in your initial inquiry. If that is from your internet provider, Telstra, that network key is what you would enter into the Kindle
after tapping Menu>Settings>Wi-Fi Networks and tapping your wi-fi network.