Edit connection Not allow change client_enconding

I am trying modify my connection in Production Environment, SC asign for default the client enconding of database selected, BUT when i try change it to other client_enconding, and i save changes, SC asign the default of the database again.

This Bug is old.: http://www.scriptcase.net/forum/showthread.php?7494-Cannot-change-client-encoding-of-MySQL-database!-Urgent&highlight=encoding

My Question now is how can i edit this connection and manually change the Encoding.?