Hi,
when i try to find a User on this way:

User user = userModule.findUserByUserName(UserName);

i get following error:

Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.apache.myfaces.el.PropertyResolverImpl.getProperty(PropertyResolverImpl.java:400)
... 274 more
Caused by: java.lang.ClassCastException: org.jboss.portal.identity.db.UserImpl
at $Proxy148.findUserByUserName(Unknown Source)
at TreeBacker.check_access(TreeBacker.java:100)
at TreeBacker.get_tree_rek(TreeBacker.java:139)
at TreeBacker.getTreeData(TreeBacker.java:232)
... 279 more


Can anybody help me? Do I need to work with Transactions? If yes, how does this work?

I want to user the User to get his Role...

thx
Marc