> InitialContext ctx = new InitialContext(props);

Could you please give me a hand?Thanks a lot.

java.lang.NullPointerException
16:51:32    at com.sun.enterprise.naming.impl.SerialContext.<init>(SerialContext.java:276)
16:51:32    at com.sun.enterprise.naming.impl.SerialContext.<init>(SerialContext.java:335)
16:51:32    at com.sun.enterprise.naming.impl.SerialInitContextFactory.createInitialContext(SerialInitContextFactory.java:358)
16:51:32    at com.sun.enterprise.naming.impl.SerialInitContextFactory.getInitialContext(SerialInitContextFactory.java:353)
16:51:32    at com.sun.enterprise.naming.SerialInitContextFactory.getInitialContext(SerialInitContextFactory.java:69)
16:51:32    at javax.naming.spi.NamingManager.getInitialContext(Unknown Source)
16:51:32    at javax.naming.InitialContext.getDefaultInitCtx(Unknown Source)
16:51:32    at javax.naming.InitialContext.init(Unknown Source)
16:51:32    at javax.naming.InitialContext.<init>(Unknown Source)