env: win7 64bit jdk 1.6.29 , geronimo-3 beta1

How to access ejb in Gbean 's methord???

I have a ejb and i can access it in web and console app;

When I access the ejb in a GBean, use the following code(the same in console app code)

ClassLoader cl = Thread.currentThread().getContextClassLoader();

cl.loadClass("org.apache.openejb.client.EJBObjectProxy");

remoteBusinessIntf = (I4Provider)context.lookup("CodeProviderTestRemote"); //SimpleServerGBean.java:121 line..

then printStackTrace:

####################

java.lang.IllegalArgumentE xception: interface org.apache.openejb.client.EJBObjectProxy is not visible from class loader

at java.lang.reflect.Proxy.getProxyClass(Proxy.java:353)

at java.lang.reflect.Proxy.newProxyInstance(Proxy.java:581)

at org.apache.openejb.client.proxy.Jdk13ProxyFactory.newProxyInstance(Jdk13ProxyFactory.java:118)

at org.apache.openejb.client.proxy.ProxyManager.newProxyInstance(ProxyManager.java:107)

at org.apache.openejb.client.EJBObjectHandler.createEJBObjectProxy(EJBObjectHandler.java:134)

at org.apache.openejb.client.JNDIContext.createBusinessObject(JNDIContext.java:193)

at org.apache.openejb.client.JNDIContext.lookup(JNDIContext.java:234)

at org.apache.aries.jndi.DelegateContext.lookup(DelegateContext.java:161)

at javax.naming.InitialContext.lookup(InitialContext.java:392)

at zzsczz.sample.SimpleServerGBean.doStart(Simp leServerGBean.java:121)

at org.apache.geronimo.gbean.runtime.GBeanInstance.createInstance(GBeanInstance.java:1000)

at org.apache.geronimo.gbean.runtime.GBeanInstanceState.attemptFullStart(GBeanInstanceState.java:271)

at org.apache.geronimo.gbean.runtime.GBeanInstanceState.start(GBeanInstanceState.java:105)

at org.apache.geronimo.gbean.runtime.GBeanInstanceState.startRecursive(GBeanInstanceState.java:127)

at org.apache.geronimo.gbean.runtime.GBeanInstance.startRecursive(GBeanInstance.java:569)

at org.apache.geronimo.kernel.basic.BasicKernel.startRecursiveGBean(BasicKernel.java:386)

at org.apache.geronimo.kernel.config.ConfigurationUtil.startConfigurationGBeans(ConfigurationUtil.java:462)

at org.apache.geronimo.kernel.config.KernelConfigurationManager.start(KernelConfigurationManager.java:226)

at org.apache.geronimo.kernel.config.Simpl eConfigurationManager.startConfiguration(SimpleConfigurationManager.java:702)

at org.apache.geronimo.kernel.config.SimpleConfigurationManager.startConfiguration(SimpleConfigurationManager.java:681)

at org.apache.geronimo.deployment.plugin.local.StartCommand.run(StartCommand.java:67)

at java.lang.Thread.run(Thread.java:662)

##############################

any ideas??