I use OracleHome81 on Windows2000. I can use sql*plus or DBA studio connect to the database successfully. But I can't connect to enterprise manager. I try to use sysman/oem_temp but failed. It noice:
VTK-1000:Unable to connect to the management server oradb.Please verify that you have entered the correct host name and the status of the Oracle Management Server.

I'm a Oracle beginner and my oracle is a chinese version. My english is poor. Please tell me the detail and use simple english.

thanks.
ocean