Follow these steps on your Kindle>
From the Home screen. Select Wi-Fi from the menu.
Ensure Wireless Networking switch is in the on position.
A list of networks will appear. You may have to wait a moment as your Kindle
detects networks in range. If your network doesn't appear tap the tick box next to
Wireless Networking off and on to refresh the list.
Tap the name of your home wifi network. On the screen prompting you to
enter a password, select Forget.
Then on your Kindle>
>press and hold the power button for 20 seconds and then release. Then when the kindle powers back on>
Let me know if this does not work and we can try another solution.
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Thank you very much!