Question about Fightcade (Not sure if this goes here)

I've been trying to play 3rd Strike on fightcade, but the online just refuses to work for me. I can play the arcade mode of the game, but if I get a challenge and click accept nothing happens. I can not spectate either. I've tweeted FightCade, and they've said that it's probably my Anti Virus and Firewall that's blocking it, but I've allowed it through my FW and I don't even have a AV, yet the problem persists. Anyone know what it could be?

Thanks, and if this is the wrong place for this feel free to move it. I'm not sure where it goes, sorry :(