When run "show client config ipaddr" in radmin, it says: ERROR: Unknown command "config"

Hi, I'm using freeradius 3 on centos 7. Is the command "show client config ipaddr" in radmin not supported any more ? when run it in radmin, it says: ERROR: Unknown command "config". However, in the man page of radmin, there is still a command "show client config <ipaddr>". I have enabled control-socket in /etc/raddb/sites-enabled, and uncomment "mode = rw" in the control-socket file. There is no problem when run "show client list" in radmin.