I never really knew Zunnie personally, nor had I met him, but by the sounds of it he was an amazing person. My condolences to his family. May he rest in peace.
I can't think of a resolve but I'm having the same problem, only when I do log in and try join UltraAOW's ren server it kicks me out instantly.
I don't think it's a ban, because I don't remember doing anything to get myself banned.