[jboss-user] [JNDI/Naming/Network] - jndi reference problem(urgent)?

[augustfox]

My environment is myeclipse4.1.1+jboss4.0.1sp1+DB28.2.
When I wanna get a database connection,i meet with a problem,the error as follows:
14:38:06,343 INFO  [STDOUT] javax.naming.NamingException: Could not dereference object [Root exception is javax.naming.NameNotFoundException: jdbc not bound]
14:38:06,343 INFO  [STDOUT] 	at org.jnp.interfaces.NamingContext.resolveLink(NamingContext.java:999)
14:38:06,343 INFO  [STDOUT] 	at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:629)
14:38:06,343 INFO  [STDOUT] 	at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:658)
14:38:06,343 INFO  [STDOUT] 	at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:520)
14:38:06,343 INFO  [STDOUT] 	at javax.naming.InitialContext.lookup(InitialContext.java:347)

My code like this:
Context context = new InitialContext();
return (DataSource) context.lookup("java:comp/env/jdbc/test"); 

I can get connecton via context.lookup("java:jdbc/test"),
but i still want to know why context.lookup("java:comp/env/jdbc/test") not works?
I want to get your help eagerly!
  

my db2-ds.xml:
<local-tx-datasource>
    <jndi-name>jdbc/test</jndi-name>
    <connection-url>jdbc:db2:tempdb</connection-url>
    <driver-class>COM.ibm.db2.jdbc.app.DB2Driver</driver-class>
    <user-name>test</user-name>
    test
    <min-pool-size>5</min-pool-size>
    <max-pool-size>20</max-pool-size>
    
    
       <type-mapping>DB2</type-mapping>
    
</local-tx-datasource>

my web.xml:
<resource-ref>
	<res-ref-name>jdbc/test</res-ref-name>
	<res-type>javax.sql.DataSource</res-type>
	<res-auth>Container</res-auth>
	<res-sharing-scope>Shareable</res-sharing-scope>
</resource-ref>

my jboss-web.xml:
<resource-ref>
	<res-ref-name>jdbc/test</res-ref-name>
	<jndi-name>jdbc/test</jndi-name>
</resource-ref>

I also tried resource-env-ref in my web.xml and jboss-web.xml,it still not works.
thanks a lot!

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