You must modify the HELP_WEB_AGENT profile in Oracle to point to the oracle_gateway.html in the Player content deployed on the server.
For Oracle E-Business Suite 11i , the URL consists of two parts: the path for the oracle_gateway.html file located in the \oracle\hemi folder in the Player content, plus the path of the default dbc file for the Oracle server.
Following is an example for 11i:
URL=http://<server name>:<port>/oracle/hemi/oracle_gateway.html?dbc=d:\oracle\o11iappl\
fnd\11.5.0\secure\<server name>.dbc
Following is an example for R12:
URL=http://<server name>:<port>/oracle/hemi/oracle_gateway.html
To modify the HELP_WEB_AGENT profile in Oracle E-Business Suite: