I want to save the log in username

Dear all
I have a complicated problem.I will explain it in four steps.
1- My application authentication depends on database users. I mean , the users who log in to the application are actually database users.
Every table contains "CREATED_BY" column. And this column is auto populated by database trigger
:NEW.CREATED_BY := USER;For example : Account "Tarek" is for an employee tarek . and this account is actually a database user . User "HR" is the schema owner. "HR" grants select ,insert on HR.Employee to user "Tarek".
In order to save the username "Tarek" who log in the application , I have to implement dynamic credential. And In fact I succeeded to do this using the following demo
[11g dynamic credential|http://www.4shared.com/rar/ektOYBXl/11gDynamicCredentials_2.html]
Until this point I managed to save the username "Tarek" who log in the application instead of "HR"
2- The problem happens when i decided to integrate my ADF application with another one .
My application name is "HrMainApplication" , implements dynamic credentials and connects to HR schema with application module "MainAppModule".
The Other application name is "PayrollApplication" , it does not implement dynamic credential , it only contains one bounded task flow"payroll-flow" with page fragment, and it connects to the same HR schema with application module name "PayRollAppModule"
3- I deployed "PayrollApplication" as adf jar library.
4- I added this jar to the main application "HrMainApplication"
5- I added the "payroll-flow" taskflow as a region in Main.jspx in the main application
6-Now I run the Login page and i connected using user "Tarek" and go to the main page.
7*-I inserted a new row and I hit commit . Data is now saved. But "Created_by" field value is "HR" not "Tarek".*
This is the problem
It seems that the "PayrollApplication" still connects to the database useing HR user not "tarek"
Should I re-implement dynamic credential in "PayrollApplication" again. And if so , how can I pass the login username to the application.
Thanks

Hi user,
Welcome to OTN world.Always share your Jdev version.
Why are you not storing the login user name into a session variable and store it into your table.

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