The current Feenix clients from their forums do not connect to Feenix at all unless you edit the realmlist to do so(it has Blizzard default). I don't know where your copy came from, but a new one from their forums should not have this problem. I use and seed Feenix 1.12, which works perfectly fine. This is a torrent link for it.
https://thepiratebay.se/torrent/5076223 ... _-_WindowsPeople are always saying Feenix has corrupted/modified clients, but I've tested both their Classic+BC clients with no issues playing on other servers. I even went as far to get a second .exe, and as far as I can tell, this "clean one" is exactly the same as what I already had. They both have the same file size down to the smallest byte, and both work the same.