WP 8.1 : TTLS PAP

As one of its 'business' features, WP8.1 includes support for TTLS PAP WiFi connections. I have tried to connect to my university WiFi, which uses an eduroam network (its a wifi provider for universities, that provides inter-university availability and works over TTLS PAP).

I have tried to connect, and It's able to know if my username and password are correct or not, but, after retrieving the server certificate and asking if it I want to trust it, it fails to connect. Have any of you tried TTLS PAP networks with 8.1? Have you experienced any issues?