error in context lookup

[siddharth paul]

When i am connecting to Sql server using following code.

 
String data_source = "jdbc/ds1";
Connection dbConnection = null;
DataSource ds = null;
contextFactory = "com.ibm.websphere.naming.WsnInitialContextFactory";

		try
		{
			Hashtable parms = new Hashtable();
			parms.put(Context.INITIAL_CONTEXT_FACTORY, contextFactory);
			Context ctx = new InitialContext(parms);
			ds = (DataSource)ctx.lookup(data_source);
                                                dbConnection = ds.getConnection();
			ctx.close();
		}

I am getting this....
A Reference object looked up from the context "localhost/nodes/localhost/servers/server1" with the name "jdbc/ds1" was sent to the JNDI Naming Manager and an exception resulted.

[Merrill Higginson]

If this code is running inside the container, there's no need to specify parameters when creating the initial context. Try creating the initial context without parameters. Example:

Context ctx = new InitialContext(); 

[siddharth paul]

i ran with.

Context ctx = new InitialContext();       

afraid to say still the same.
Below from WSAD console.

[2/3/09 15:27:22:201 IST] 505ecddf Helpers W NMSV0605W: A Reference object looked up from the context "localhost/nodes/localhost/servers/server1" with the name "jdbc/ds1" was sent to the JNDI Naming Manager and an exception resulted. Reference data follows:
Reference Factory Class Name: com.ibm.websphere.advanced.cm.factory.DataSourceFactory$ResourceReferenceObjectFactory
Reference Factory Class Location URLs: <null>
......
......

Exception data follows:
javax.naming.NamingException: Attempted to use a 4.0 DataSource in EJB 2.0 Module. Invalid configuration.
at com.ibm.ejs.cm.DSFactoryImpl.verifyConfiguration(DSFactoryImpl.java:272)
.....
.....

[vamsheedhar devarishati]

Make sure You added ref in Deployment Descriptor like this and make sure it is loaded when jvm starts.

<resource-ref id="ResourceRef_1126121987734">
<description></description>
<res-ref-name>jdbc/localds1</res-ref-name>
<res-type>javax.sql.DataSource</res-type>
<res-auth>Container</res-auth>
<res-sharing-scope>Shareable</res-sharing-scope>
</resource-ref>

After server start up , be fore hitting the app , search for datasorce ...