Need help:Urgent:MS SQL Server and J2EE Server

Hello,
i am developing simple bean managed persistence bean. i want to know how could i use microsoft SQL Server as my database with ejb's in J2EE. i don't want to use cloudscape rather i want to connect through jdbc bridge with sql server. can any body help me out ?
i have developed DSN for my database with the name of DsnProduct and user name for DB is guest and password is guest123.
so do i have to change configuration is my J2EE server . or put some additional code. so far i have added the following line in my implementation class
private String dbName= "java:comp/env/jdbc/ProductDB";
DataSource ds = (DataSource) ic.lookup(dbName);
con = ds.getConnection("guest","guest123");
moreover in server configuration i have added driver
sun.jdbc.odbc.JdbcOdbcDriver
and also provide the following JNDI Name
jdbc/ProductDB
and
it's url is
jdbc:odbc:DsnProduct
i am thankfull for your support.
[email protected]

hi llturro,
Thanks for answering my question. I have tried out what you suggested, but I still can't fix my problem. The following are the messages that display when I try to run my servlet. It seems that the DataSource, Connection and Statement are ok, however when it comes to the ResultSet the error message appear. What's wrong with my ResultSet coding ?
ResultSet rs = stat.executeQuery("SELECT ISBN FROM BOOKSINFO WHERE ISBN='"+primarykey+"'");
setEntityContext Method
Find by primary key
DataSource OK
Connection OK
Primary Key = 013-00-675721-9
Statement OK
java.rmi.ServerException: RemoteException occurred in server thread; nested exception is:
java.rmi.RemoteException: Unknown Exception/Error thrown by EJB method.; nested exception is:
java.lang.NullPointerException
java.rmi.RemoteException: Unknown Exception/Error thrown by EJB method.; nested exception is:
java.lang.NullPointerException
java.lang.NullPointerException
<<no stack trace available>>

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