How to create DBA user from oracle APEX 11gR2 XE Please anyone tell me how to create DBA user from ORACLE Application express(http://127.0.0.1:8080/apex/apex_admin)?

I installed Oracle 11gR2 XE on windows 8.1 PC and I am able to login to Oracle APEX (above link) with username: "ADMIN" and password used during installation. but I can't use same username/password to login to "Oracle SQL Command Line". I am trying to connect with command 

CONNECT username/password


All other solutions suggests a command "CREATE USER....." but I don't know where to write that command without connecting SQL Command line. I am missing a simple step somewhere. please help me.

My question is exactly opposite of this question. User with dba privs can&#39;t login to APEX, but can from SQL*Plus

Where I can login to Oracle APEX web interface and create new workspace, Schemas, Users but I am not able to login to SQL Command line to create Database objects.
Here is an article from dba-oracle which talk about this same problem. This might solve the issue you are having.