Unable to bring Enterprise Mgr v2.0.4 apps - get ORA-12222

Question

I am a member of OTN and bought Oracle Enterprise Manager v2.0.4
and Oracle 8i v8.1.5 for NT.
Background
=========
I have successfully installed v8.1.5 Oracle Server for NT. I have
NT 4.0 SP 5 running on my Workstation. I able to run the java
samples and run SQL and configure the ODBC. I have also setup an
DB alias through Net8 config manager.
I have installed Oracle 8.1.5 in d:\orant and Enterprise Manager
in d:\orant\em directories. Both installations have different
oracle homes.
Problem
=======
I have also installed Oracel Enterprise Manager v2.0.4. When
installing the package and running the Enterprise Configuration
Assistant, I ran into problems. I keep getting 'Lost Database
connection" ORA - 12203 error.
Although the software installed correctly, cannot run the
enterprise manager applications like the instance manager, the EM
configuration manager because of the above error. I also tried to
connect using the <host>:<port>:<SID> format. This time I get a
ORA-12222 error. I also get the same error when I run SQLPLUS
from the enterprise manager
example: plus80 scott@MYDB but if I run the SQL Plus from the
StartMenu, I am able to connect to the database.
However I am able to run a java application using the above
format. I have configured the DB alias using the Net8 config
assistant and the test was successful.
I need this fixed ASAP.
null

Answer 1

wsordv[mdtts]-/home/oracle >emctl status dbconsole
Oracle Enterprise Manager 10g Database Control Release 10.2.0.3.0
Copyright (c) 1996, 2006 Oracle Corporation. All rights reserved.
http://wsordv:5500/em/console/aboutApplication
Oracle Enterprise Manager 10g is running.
Logs are generated in directory /u01/oracle/10g/wsordv_mdtts/sysman/log
wsordv[mdtts]-/home/oracle >
NOW use
http://wsordv:5500/em
in your Internet explorer to open up EM console.