I have installed the Legion Models pack into the Data folder, individually, and without being put into a subfolder. Yet the game still displays the Classic models. Is there something I need to do that I missed?

For whatever reason, I can only log onto the game for less than 2 minutes before it kicks me to log in saying there was a connection issue, and constantly gives me an "Unable to connect" message after being stuck on "Connecting" It still says I'm on the TrueWoW server and am unsure what the issue is...