Custom Security in JHeadstart TP1 - error with JhsAuthorizationProxy

Question

I am trying to implement jheadstart security in my application.
I am using JDeveloper 11.1.1.0.2 and JHeadstart 11 TP1.
In JHeadstart I have used the following options:
Authentication Type : Custom
Authorisation Type : Custom
Authorize using Group permission? --> unchecked
Administartor Role: ADMIN
User Role : USER
Insert Allowed EL Expression : #{jhsUserRoles}
UpdateAllowed EL Expression : #{jhsUserRoles}
DeleteAllowed EL Expression : #{jhsUserRoles}
When Access denied go to Next Group check box --> unchecked.
I am using the JHS-tables for security.
I ran the SecurityAdminService module.
After running my application I can use my login page. I am using user Steven King (administrator).
Login is successfull and I can see my application, but when I try to open a screen I get the following error:
]] Root cause of ServletException.
java.lang.IllegalArgumentException: Cannot convert {} of type class oracle.jheadstart.controller.jsf.JhsAuthorizationProxy to class java.lang.Boolean
     at com.sun.el.lang.ELSupport.coerceToBoolean(ELSupport.java:169)
     at com.sun.el.lang.ELSupport.coerceToType(ELSupport.java:346)
     at com.sun.el.ValueExpressionImpl.getValue(ValueExpressionImpl.java:194)
     at org.apache.myfaces.trinidad.bean.FacesBeanImpl.getProperty(FacesBeanImpl.java:68)
     at org.apache.myfaces.trinidad.component.UIXComponentBase.getBooleanProperty(UIXComponentBase.java:1175)
     Truncated. see log file for complete stacktrace
Can anyone tell me what is wrong with my JhsAuthorizationProxy?
In the JhsCommon-Beans.xml I have the following text about JhsAuthorizationProxy:
<managed-bean>
<managed-bean-name>jhsUserRoles</managed-bean-name>
<managed-bean-class>oracle.jheadstart.controller.jsf.JhsAuthorizationProxy</managed-bean-class>
<managed-bean-scope>session</managed-bean-scope>
<managed-property>
<property-name>authorizationType</property-name>
<value>custom</value>
</managed-property>
<managed-property>
<property-name>authorizeUsingPermissions</property-name>
<value>false</value>
</managed-property>
</managed-bean>

Answer 1

Problem is solved. In the group-definition the Insert (Update and Delete) Allowed EL Expression was empty.