javax.naming.NoInitialContextException: Need to specify class name in

ejb入门提问！在先等！
javax.naming.NoInitialContextException: Need to specify class name in environment or system property, or as an applet parameter, or in an application resource file: java.naming.factory.initial
at javax.naming.spi.NamingManager.getInitialContext(Unknown Source)
at javax.naming.InitialContext.getDefaultInitCtx(Unknown Source)
at javax.naming.InitialContext.getURLOrDefaultInitCtx(Unknown Source)
at javax.naming.InitialContext.lookup(Unknown Source)
at com.test.util.HelloWorldTest.main(HelloWorldTest.java:20)

Java code

Properties props = new Properties();        props.setProperty("java.naming.factory.initial ", "org.jnp.interfaces.NamingContextFactory");        props.setProperty("java.naming.provider.url ", "localhost:1099");        InitialContext ctx;        try {            ctx = new InitialContext(props);            HelloWorld helloWorld = (HelloWorld)ctx.lookup("HelloImpl/remote");            System.out.println(helloWorld.sayHello("小曹"));        } catch (NamingException e) {            e.printStackTrace();        }

一个接口，一个实现类！client的炸包都拷了。
求救！！！！

------解决方案--------------------
你配的是不有问题，代码我没看出来有问题
------解决方案--------------------
%JBOSS_HOME%/server/default/deploy/jboss-web.deployer/META-INF/jboss-service.xml 
中的<attribute name=”UseJBossWebLoader”>false</attribute> （58行把）该为true 重启JBOSS