I installed Apex 4.2.3 in an 11.2 database. I followed the document very closely and installed it in a sandbox database. After noting passwords, directory names, etc., I followed the same procedure for the production database where we will do development--the database is strictly for DBA use and has been live for some time now. I have no problems with the sandbox version. I can login to the admin page and to http://<hostname>:8080/apex as well to begin development. I cannot login to either for the production version.
Both lsnrctl status and netstat -a|grep 8080 show that there is nothing listening on port 8080. I have started/stopped both the database and the listener after running the apex_epg_config script. lsnrctl status does not show the XDB dispatchers running. All I see is the default port 1521.
I am at a loss as how to continue. Any ideas?