Ho do i inject the objectname property of org.springframework.jmx.access.MBeanProxyFactoryBe an

example:
<bean id="remoteRantServiceMBean"
class="org.springframework.jmx.access.MBeanProxyFa ctoryBean">
<property name="objectName" value="rantz:name=RantService" />
<property name="server" ref="mBeanServerClient" />
</bean>

i am getting an error:
Failed to convert property value of type [java.lang.String] to required type [javax.management.ObjectName] for property 'objectName';