My MIFI4510L Is denying my password. Help?

[chase1024]

I have just gotten my 4G LTE MIFI4510L Mobile Hotspot and haven't done anything but update it. After I did so I tried to connect to the wifi and it says "password invalid every time i attempt to connect on any device in the house, Iphone, Windows Laptop, Macbook, etc. The password on the back is surely the password to connect to the wifi because it says "Wifi Admin Password:" and still, I carefully type it in and no success, I have never been able to connect. Why? Please Help!

Thanks!