“javax.faces.convert.ConverterException: Unsupported Model Type” in ADF 10g for selectManyCheckbox - backing

gistfile1.java

ArrayList<javax.faces.model.SelectItem> initialListItems;

public ArrayList getInitialListItems() {
	if(initialListItems == null) {
		initialListItems = new ArrayList();
		JUIteratorBinding paramIter =
					 (JUIteratorBinding)JSFUtils.resolveExpression("#{bindings.ParamView1Iterator}");
		for(int i = 0; i < paramIter.getEstimatedRowCount(); i++) {
			ParamViewRowImpl paramRow = (ParamViewRowImpl)paramIter.getRowAtRangeIndex(i);
			SelectItem si = new SelectItem();
			si.setValue(paramRow.getParamkey());
			si.setLabel(paramRow.getParamvalue());
			initialListItems.add(si);
		}
	}
	return initialListItems;
}
java.util.List selectedItems;

public void setSelectedItems(List selectedItems) {
	this.selectedItems = selectedItems;
}

public List getSelectedItems() {
	return selectedItems;
}