New internet service, now I can't connect to my wifi

[cg1977]

Ok, so I am not new to this but I am having an issue today. I had AT&T internet w/wifi for years, now I just upgraded to AT&T U-verse. I had no problem before, until today.
Before, I had a 2-wire modem and had no issues, and I didn't think I would have any issues because now I have a shiny new 2-wire modem.
The only difference that I know of are the security settings.

My settings before:
Authentication: Shared
Data Encryption: WEP
The key is automatically provided: Unchecked
Network Key: **********

Now:
Authentication: WPA
Data Encryption: TKIP
(Then I try to uncheck box and it is greyed out-see pic)