Error 3924 wifi password incorrect

Question

I recently received an Apple TV (ver 3) as a present, and am struggling to get it to connect with my WiFi network. I receive the error "The WiFi password you have entered is not correct. Try again." (error 3924).
I have a dlink router model DIR-615, which works fine with my iMac (hard wire connection), and three other electronic devices, all wirelessly connected. My wireless network is set up using WPA2 security.
The Apple TV sees the network OK, and will connect without any problem when there is no security enabled- I was even able to update the Apple TV's software over the network. But when I re-enable security, I'm back to the same error.
There are three "passwords" associated with the router:
- the WPA2 key, a long series of numbers and letters a through f (not really a password, but part of the security)
- an administrator password, used to gain access to the router's settings
- a user password
I thought that the Apple TV was looking for the user password, but when I enter that password I get the error message. I tried entering the other two 'passwords' to no avail (same error). All the passwords contain only letters (caps and small) and numbers.
I am working on getting wired access to the television area, but it is a long-term project. In the meantime I have no interest in running an unsecured network. According to what I have read Apple TV connects fine with WPA2 secured networks. I have restarted both the Apple TV and router, no effect.
Any suggestions would be appreciated.
Thank you!

Answer 1

I figured it out. The router I have puts what the Apple TV calls a 'password' in a wireless management setting called "Pre-Shared Key", the WPA2 key mentioned in my initial post. This is where I entered the password, and after entering the same password in the Apple TV, the connection was fine. Got tripped up with the terminology!
Cheers!