Solved.
A whitelist app has been established.
Please fill out an application here http://www.forums.hypergamer.net/minecraft-aceon-medieval-roleplay/minecraft-tempoary-whitelist-apps/ (http://www.forums.hypergamer.net/minecraft-aceon-medieval-roleplay/minecraft-tempoary-whitelist-apps/) to get yourself whitelisted.
Your both on the whitelist now. Try joining.