HP photosmart 6520 Printer not recognizing WiFi network password to be valid and it is

[DD-9577_1]

My printer is finding my WiFi network but when I enter the correct password it says invalid. This printer has connected to and used this same network with same password before. 
Please Help!!

Thanks in advance 

DD

[TEJ1602]

@DD-9577_1, Welcome to HP Support Community!

Follow the steps below-

1. From the home screen of your printer control panel, touch the Wireless icon .

2. Touch the Setup icon .

3. Touch Restore Network Defaults or Restore Network Settings, and then touch Yes to confirm your selection.

4. After the default network settings are restored, touch the back arrow, touch Wireless Settings, and then touch Wireless Setup Wizard.

   The printer searches for available networks.

5. Touch the name of your wireless network.

6. If your wireless network does not display in the list of wireless networks, touch Enter New Network Name, and then type the name of your wireless network.

   NOTE: 

   Type the exact network name, including any uppercase and lowercase letters.

7. Type the WEP or WPA key (network password), and then touch Done.

   If you do not know your network password, go to Find Your Wireless WEP, WPA, WPA2 Password..

   Once the printer connects to the wireless network, the blue Wireless light on the control panel turns on solid.

8. If the printer fails to connect, print a Wireless Network Test Report, and then follow any instructions on the report to troubleshoot wireless connectivity problems. For more information, go to Using a Wireless Network Test Report.

Additionally, refer to the document Connect to a Wireless HP Printer for help.

If you still have issues, use the guided troubleshooter Troubleshooting | Wireless Printing Center for instruction to isolate and resolve the issue.

Hope this helps! Keep me posted. 

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