Shared And Dedicated Server Process

I am facing this problem
i used to have a dedicated server process and i needed to change it to the shared server process i done the following:

1. shutdoen the data base
2. add the following to init.ora
Dispatchers="(Protocol=TCP)(dispatchers=5)"
Max_Dispatchers=10
Shared_Servers=5
Max_Shared_Servers=15

3. and reconfigred the tnsnames as follows:
ORCL =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = TCP)(HOST = EDATA14.Edata.local)(PORT = 1521))
)
(CONNECT_DATA =
(SERVICE_NAME = orcl)
(SeRVeR = SHARED)
)
)

restarted the databse
when i connect using sys the session in shared mode
but when i connect using any other user it appear in dedicated Mode
What is my problem.

Thanx alot.