Can't connect to secured wired connection

[zimmi]

Hi,
We've got 802.1X secured network in the office that uses a PEAP authentication (MSCHAPv2). Whenever I try to connect to this network, the connection dies immediately and all I get in the /var/log/syslog is "network has security, but secrets are required", although I provide my domain password as well. No communication logged in router logs, like I haven't even tried to connect. This network works fine on other Ubuntu laptops in our office.

Is there:
1) any way to get the Ubuntu network manager GUI into Freya? I've been having issues with the built-in GUI ever since the installation.
2) anything else to try the connection?

I'm running HP ProBook.