Error getting ValueProxy with Request Factory !

Hi everyone,

In client side, I want to create a proxy that extend ValueProxy:

AdministratorProxy adminProxy = factory.createAdminRequest().create(AdministratorProxy.class);

I get this error: 

com.google.gwt.event.shared.UmbrellaException: Exception caught: com.emi.cbr4wsd.shared.proxy.AdministratorProxy is not an EntityProxy type

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