rich:pickList Problem

[gibbs_wesley1]

My problem is with a rich:pickList......... It displays on the page in IE but when I select the button to transfer 1 or more items from the left window to the right one, it throws the exception:

javax.servlet.ServletException: ValueBinding for UISelectMany must be of type List or Array

The code in my JSF file related to my problem:

<rich:pickList id="privGroupList" value="#{cvPrivGroupList}" >
<s:selectItems var="value" label="#{value.name}" value="#{userManagement.allPrivGroups}" />
<s:convertEntity />
<a4j:support event="onlistchanged" reRender="privGroupList" />
</rich:pickList>

and this is the code in my session bean related to my problem:

 @In(required=false,scope=ScopeType.CONVERSATION)
 @Out(required=false,scope=ScopeType.CONVERSATION)
 private List<PermissionAssignment> cvPrivGroupList;

 public List<PrivGroup> getAllPrivGroups() {
 return entityManager.createQuery("from PrivGroup").getResultList();
 }

 private Map values = new Values();

 public Map getValues()
 {
 return values;
 }

 private class Values extends HashMap {
 public Object get() {
 return Collections.EMPTY_LIST;

 }
 }

Any help is appreciated,
Wes