Please find the error and advise me
javax.naming.NamingException: Could not load ejb proxy class com.istana.schedule.feature.Manager/HelloWorldSessionBean//HelloWorldBean!com.ibytecode.business.HelloWorld [Root exception is java.lang.ClassNotFoundException: com.istana.schedule.feature.Manager/HelloWorldSessionBean//HelloWorldBean!com.ibytecode.business.HelloWorld]
at org.jboss.ejb.client.naming.ejb.EjbNamingContext.createEjbProxy(EjbNamingContext.java:108)
at org.jboss.ejb.client.naming.ejb.EjbNamingContext.lookup(EjbNamingContext.java:96)
at javax.naming.InitialContext.lookup(InitialContext.java:411)
at com.ibytecode.client.EJBApplicationClient.doLookup(EJBApplicationClient.java:26)
at com.ibytecode.client.EJBApplicationClient.main(EJBApplicationClient.java:13)
Caused by: java.lang.ClassNotFoundException: com.istana.schedule.feature.Manager/HelloWorldSessionBean//HelloWorldBean!com.ibytecode.business.HelloWorld
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:274)
at org.jboss.ejb.client.naming.ejb.EjbNamingContext.createEjbProxy(EjbNamingContext.java:106)
... 4 more
Exception in thread "main" java.lang.NullPointerException
at com.ibytecode.client.EJBApplicationClient.main(EJBApplicationClient.java:14)