this guy Bruce is being sued by evony. looks like he uncovered some malware type stuff in evony client. maybe this is why evony doesnt like you using another client lol.
http://www.bruceongames.com/page/2/in the beginning of that he lists the ppl behind evony. One guy is Eric Liam. ( i think is his name lol) Liam is being sued by microsoft for fake click scams. more malware and spyware type stuff. Scared to open evony client anymroe now lol. Here is link explaining the lawsuit