listshuttle Converter problems

[langer123]

I have the following converter:

public class TomsShuttleListConverter implements Converter
{
          public Object getAsObject(FacesContext context, UIComponent component,String value) throws ConverterException
          {  
                    SelectItem items = new SelectItem(); 
                    items.setValue(value);
                    return items;
          }  
          public String getAsString(FacesContext context, UIComponent component,Object value) throws ConverterException
          {  
                    SelectItem items = (SelectItem) value; 
                    return beanItems.getValue().toString();
          }  
}

And the following list shuttle:

<rich:listShuttle sourceValue="#{MyBean.filteredFieldsList}" sourceSelected="MyBean.selectedCDFFields"
                                targetValue="#{MyBean.allSelectedCDFFields}" targetSelected="MyBean.deSelectedCDFFields" converter="TomsShuttleListConverter" 
                                listsHeight="180" sourceListWidth="260" targetListWidth="260" sourceCaptionLabel="Available Items" var="selectItems"
                                fastOrderControlsVisible="false" fastMoveControlsVisible="false" targetCaptionLabel="Currently Active Items"
                                copyControlClass="largerBtn" onclick="requiredField(this);">

I can see calls going into the getAsString and working correctly. But when the getAsObject method is called I get the following error:

Component customTypeForm:j_id1914 has invalid value expression javax.faces.model.SelectItem@7a1d7b72

Is it something to do with the way I'm creating my object? I can see it is going into the getAsObject method.

Thanks