weblogic ejb javax.naming.NameNotFoundException异常

ejb编译都很正常，可是在执行操作时，报如下错误：
Exception : javax.naming.NameNotFoundException: Unable to resolve
'teleweb.ejb.svy.sessionbean.SvyQuestMngHome' Resolved teleweb.ejb.svy.session
ean; remaining name 'SvyQuestMngHome'
essage : Unable to resolve 'teleweb.ejb.svy.sessionbean.SvyQuestMngHome' Resol
ved teleweb.ejb.svy.sessionbean : teleweb.ejb.svy.sessionbean.SvyQuestMngHome
aught location : [TelewebSessionGateway->getHome] getHome(String homeName)
eleweb.com.TelewebErrorException
at teleweb.servlet.TelewebSessionGateway.getHome(TelewebSessionGateway.j
va:68)
at teleweb.servlet.TelewebSessionGateway.invoke(TelewebSessionGateway.ja
a:240)
at teleweb.servlet.TelewebCommJSP.getEjbRemote(TelewebCommJSP.java:146)
at jsp_servlet._webapp._svy.__svyquest._jspService(__svyquest.java:473)
at weblogic.servlet.jsp.JspBase.service(JspBase.java:33)
at weblogic.servlet.internal.ServletStubImpl$ServletInvocationAction.run
ServletStubImpl.java:1006)
at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubIm
l.java:419)
at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubIm
l.java:315)
at weblogic.servlet.internal.WebAppServletContext$ServletInvocationActio
.run(WebAppServletContext.java:6718)
at weblogic.security.acl.internal.AuthenticatedSubject.doAs(Authenticate
Subject.java:321)
at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:
21)
at weblogic.servlet.internal.WebAppServletContext.invokeServlet(WebAppSe
vletContext.java:3764)
at weblogic.servlet.internal.ServletRequestImpl.execute(ServletRequestIm
l.java:2644)
at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:219)
at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:178)
请教各位什么原因