methods invocation interceptor

Hello Event body,
I'm trying to use "MethodSecurityInterceptor" in order to manage methods invocation.
But, this doesn't work.
and i get in return this exeption:
"Caused by: java.lang.IllegalStateException: Cannot convert value of type [java.lang.String] to required type [org.springframework.security.access.meth
od.MethodSecurityMetadataSource] for property 'securityMetadataSource': no matching editors or conversion strategy found"
can you help me to get rid of this problem.

SOURCE:
"
<beans: bean class="org.springframework.security.access.interce pt.aopalliance.MethodSecurityInterceptor"
id="tutoManagerSecurity">
<beans: property name="authenticationManager" ref="authenticationManager"/>
<beans: property name="accessDecisionManager" ref="secureAccessDecisionManager"/>
<beans: property name="afterInvocationManager" ref="postInvocationManager"/>
<beans: property name="securityMetadataSource" >
<beans: value>controller.MeetingController.connected_user* =ROLE_USER</beans:value>
</beans: property>
</beans: bean>


<beans: bean id="secureAccessDecisionManager" class="org.springframework.security.access.vote.Un animousBased">
<beans: property name="decisionVoters">
<beans: list>
<beans: ref bean="roleVoter" />
<beans: ref bean="himselfVoter" />
</beans: list>
</beans: property>
</beans: bean>

<beans: bean id="roleVoter" class="org.springframework.security.access.vote.Ro leVoter">
<beans: property name="rolePrefix">
<beans: value>ROLE_</beans:value>
</beans: property>
</beans: bean>

<beans: bean id="himselfVoter" class="security.HimselfVoter">
<beans: property name="rolePrefix">
<beans: value>HIMSELF</beans:value>
</beans: property>
</beans: bean>

<beans: bean id="postInvocationManager"
class="org.springframework.security.access.interce pt.AfterInvocationProviderManager">
<beans: property name="providers">
<beans: list>
<beans: ref bean="postInvocationProvider" />
</beans: list>
</beans: property>
</beans: bean>

<beans: bean id="postInvocationProvider"
class="org.springframework.security.access.prepost .PostInvocationAdviceProvider">
<beans: constructor-arg ref="postAdvice" />
</beans: bean>

<beans: bean id="postAdvice"
class="org.springframework.security.access.express ion.method.ExpressionBasedPostInvocationAdvice">
<beans: constructor-arg ref="defaultMethodSecurityExpressionHandler" />
</beans: bean>

<beans: bean id="defaultMethodSecurityExpressionHandler"
class="org.springframework.security.access.express ion.method.DefaultMethodSecurityExpressionHandler" />
"