Failed to connect to database - Unable to connect to Oracle Applications database (afscpgcs)

PROBLEM

I had error when tried to coonect BI Discoverer.

A connection error.
- Oracle BI Discoverer is unable to authenticate using the password provided. This can happen due to an invalid password or because the password was lost while using back, forward, or refresh in your browser. Enter the password again to continue.
- Failed to connect to database - Unable to connect to Oracle Applications database (afscpgcs)


SOLUTION
Copy application .dbc file under Middelware_Home\asinst_no\config\Discoverer\Discoverer_asinst_no