security exception

[Terence Kwan]

I keep geting security exception even I set the following role information:
        <assembly-descriptor>
                <security-role>
                        <role-name>guests</role-name>
                </security-role>
                <method-permission>
                        <method>
                                <method-name>*</method-name>
                        </method>
                </method-permission>
        </assembly-descriptor>

The exception which i get is:

java.lang.SecurityException: guest is not allowed to call this method, check your 
security settings.
        at SessionHomeWrapper1.create(SessionHomeWrapper1.java:13)
        at __jspPage18._jspService(__jspPage18.java:45)
        at com.evermind.server.http.EvermindHttpJspPage.service(JAX)
        at com.evermind.server.http.HttpApplication.oc(JAX)
        at com.evermind.server.http.JSPServlet.service(JAX)
        at cv.kt(JAX)
        at cv.forward(JAX)
        at c4.mu(JAX, Compiled Code)
        at c.run(JAX, Compiled Code)