WAS 5.1 clients session management

[oppamelo]

Hi,

I'm developing a web based application using MVC
pattern and EJB (Session and Entity CMP).
I'm using to do that WSAD 4.1.

The problem is:
I tried to make a simultaneus insert operation
from 2 different clients (machines) submitting different data
and i see the same data on the DB table!!!

I'm not using statefull objects!!!!

I also tried to reinstall the application
but the problem still occurs.

Is there someone that can help me?
I hope in your answer soon as possible.

Thank you