i deployed a cmp then use jsp to test it.
it throw error

2002-10-04 14:08:11,000 ERROR [org.jboss.ejb.plugins.LogInterceptor] EJBException, causedBy:
java.lang.InstantiationException
at sun.reflect.InstantiationExceptionConstructorAccessorImpl.newInstance(InstantiationExceptionConstructorAccessorImpl.java:30)
at java.lang.reflect.Constructor.newInstance(Constructor.java:274)
at java.lang.Class.newInstance0(Class.java:296)
at java.lang.Class.newInstance(Class.java:249)
at org.jboss.ejb.plugins.jaws.JAWSPersistenceManager.createBeanClassInstance(JAWSPersistenceManager.java:165)
at org.jboss.ejb.plugins.CMPPersistenceManager.createBeanClassInstance(CMPPersistenceManager.java:165)
at org.jboss.resource.connectionmanager.CachedConnectionInterceptor.createBeanClassInstance(CachedConnectionInterceptor.java:251)
at org.jboss.ejb.EntityContainer.createBeanClassInstance(EntityContainer.java:294)
at org.jboss.ejb.plugins.AbstractInstancePool.get(AbstractInstancePool.java:209)
at org.jboss.ejb.plugins.EntityInstanceInterceptor.invokeHome(EntityInstanceInterceptor.java:76)
at org.jboss.ejb.plugins.EntityLockInterceptor.invokeHome(EntityLockInterceptor.java:79)
at org.jboss.ejb.plugins.EntityCreationInterceptor.invokeHome(EntityCreationInterceptor.java:44)
at org.jboss.ejb.plugins.AbstractTxInterceptor.invokeNext(AbstractTxInterceptor.java:111)
at org.jboss.ejb.plugins.TxInterceptorCMT.runWithTransactions(TxInterceptorCMT.java:178)
at org.jboss.ejb.plugins.TxInterceptorCMT.invokeHome(TxInterceptorCMT.java:52)
at org.jboss.ejb.plugins.SecurityInterceptor.invokeHome(SecurityInterceptor.java:105)
at org.jboss.ejb.plugins.LogInterceptor.invokeHome(LogInterceptor.java:129)
at org.jboss.ejb.EntityContainer.invokeHome(EntityContainer.java:487)
at org.jboss.ejb.Container.invoke(Container.java:730)
at org.jboss.ejb.EntityContainer.invoke(EntityContainer.java:1058)
at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:517)
at org.jboss.invocation.local.LocalInvoker.invoke(LocalInvoker.java:98)
at org.jboss.invocation.InvokerInterceptor.invoke(InvokerInterceptor.java:102)
at org.jboss.proxy.TransactionInterceptor.invoke(TransactionInterceptor.java:77)
at org.jboss.proxy.SecurityInterceptor.invoke(SecurityInterceptor.java:80)
at org.jboss.proxy.ejb.HomeInterceptor.invoke(HomeInterceptor.java:198)
at org.jboss.proxy.ClientContainer.invoke(ClientContainer.java:76)
at $Proxy925.create(Unknown Source)
at org.apache.jsp.testCmp$jsp._jspService(testCmp$jsp.java:95)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:107)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at org.apache.jasper.servlet.JspServlet$JspServletWrapper.service(JspServlet.java:201)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:381)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:473)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:366)
at org.mortbay.jetty.servlet.WebApplicationHandler.dispatch(WebApplicationHandler.java:284)
at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:577)
at org.mortbay.http.HttpContext.handle(HttpContext.java:1674)
at org.mortbay.jetty.servlet.WebApplicationContext.handle(WebApplicationContext.java:544)
at org.mortbay.http.HttpContext.handle(HttpContext.java:1624)
at org.mortbay.http.HttpServer.service(HttpServer.java:875)
at org.jboss.jetty.Jetty.service(Jetty.java:541)
at org.mortbay.http.HttpConnection.service(HttpConnection.java:785)
at org.mortbay.http.HttpConnection.handleNext(HttpConnection.java:935)
at org.mortbay.http.HttpConnection.handle(HttpConnection.java:802)
at org.mortbay.http.SocketListener.handleConnection(SocketListener.java:200)
at org.mortbay.util.ThreadedServer.handle(ThreadedServer.java:294)
at org.mortbay.util.ThreadPool$JobRunner.run(ThreadPool.java:743)
at java.lang.Thread.run(Thread.java:536)


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my config is
ejb-jar.xml

<ejb-name>CustomerEJB</ejb-name>
com.gdb.app.sample.ejb.CustomerHomeRemote
com.gdb.app.sample.ejb.CustomerRemote
<ejb-class>com.gdb.app.sample.ejb.CustomerBean</ejb-class>
<persistence-type>Container</persistence-type>
<prim-key-class>java.lang.Integer</prim-key-class>
False
<cmp-version>2.x</cmp-version>
<abstract-schema-name>Customer</abstract-schema-name>
<cmp-field><field-name>id</field-name></cmp-field>
<cmp-field><field-name>lastName</field-name></cmp-field>
<cmp-field><field-name>firstName</field-name></cmp-field>
<primkey-field>id</primkey-field>
<security-identity><use-caller-identity/></security-identity>