I want spring jmx in weblogic 8.1

I am a new bee to weblogic 8.1, I want spring mbeans for my application.

here is the configration i am using
<bean id="mbeanServer" class="org.springframework.jmx.support.WebLogicJnd iMBeanServerFactoryBean"/>

<bean id="exporter" class="org.springframework.jmx.export.MBeanExporte r">
<property name="beans">
<map>
<entry key="bean:name=testBean1" value-ref="testBean"/>
</map>
</property>
<property name="server" ref="mbeanServer"/>
<property name="autodetect" value="true"/>

</bean>

<bean id="testBean" class="com.uprr.app.pcr.mbean.beans.JmxTestBean">
<property name="name" value="TEST"/>
<property name="age" value="100"/>
</bean>

I get no exception nothign but I donot see mbeans in my server console to edit properties , In oc4j I was able to update the properties through admin consle but in weblogic 8.1 how ?