Hi! ! Rajeev

Yes, I checked the tnsnames.ora file.All the host name,port, and SID were exactly same; (Host:junghun,port:1521,SID:orcl) . I also tried SYSMAN/oem_temp as ID and Password. I really don't know why it doesn't work. I am wordering that oracle running on local server still can connect to the management server?
HELP!!!

Jung