Check Your Password. The password may have been typed incorrectly. Most passwords are case sensitive. Double check it and try again. Caps Lock/Num Lock. When typing in your password, make sure the Caps Lock is off and Num Lock is on. Move Closer. Your device may not be close enough to your Wi-Fi router or access point. Even though you may see 3 or 4 bars coming from your router, that doesn't necessarily mean the antenna in your device is strong enough to talk back to the router. Move closer and try again.