there is no need to disable the ident server. irc networks/servers usually only use it to check ur client (mIRC in this case) and the check only occurs when you first connect.
what i might suggest is you change your ident name. because in some instances the server checks your ident and tries to match it with other names that may not be acceptable or names that are associated with malicious scripts.
so again. my advice would be to change your ident name. and try to stay away from special characters
