Factory Spring erro

<?xml version="1.0" encoding="UTF-8"?>

<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:context="http://www.springframework.org/schema/context"
       xsi:schemaLocation="http://www.springframework.org/schema/beans 
           http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
           http://www.springframework.org/schema/context
           http://www.springframework.org/schema/context/spring-context-2.5.xsd">

	 
	 <bean id="categoria" class="model.Categoria" />
	 <bean id="endereco" class="model.Endereco" />
	 <bean id="lance" class="model.Lance" />
	 <bean id="post" class="model.Post" />
	 <bean id="projeto" class="model.Projeto" />
	 <bean id="tipolance" class="model.TipoLance" />
	 <bean id="usuario" class="model.Usuario" />
</beans>

<?xml version="1.0" encoding="UTF-8"?>

<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:context="http://www.springframework.org/schema/context"
       xsi:schemaLocation="http://www.springframework.org/schema/beans 
           http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
           http://www.springframework.org/schema/context
           http://www.springframework.org/schema/context/spring-context-2.5.xsd">

<bean id="modelfactory" class="org.springframework.context.support.ClassPathXmlApplicationContext">
        <constructor-arg>
            <list>
                <value>application-model.xml</value>
            </list>
        </constructor-arg>
</bean>
</beans>

package utils;

import org.apache.commons.lang.NullArgumentException;
import org.springframework.beans.factory.BeanFactory;
import org.springframework.beans.factory.access.BeanFactoryLocator;
import org.springframework.beans.factory.access.BeanFactoryReference;
import org.springframework.context.access.ContextSingletonBeanFactoryLocator;
 
 
public class ServiceLocator {
	
	private static final ServiceLocator INSTANCE = new ServiceLocator();
		
	private final BeanFactoryReference factoryReference;
	
	
	private ServiceLocator() {
		BeanFactoryLocator factoryLocator = ContextSingletonBeanFactoryLocator.getInstance();
		factoryReference = factoryLocator.useBeanFactory("modelfactory");
		
	
	}
		
	public static ServiceLocator getInstance() {
		return INSTANCE;
	}
	
	public Object getObject(String name) {
		try {
			if (name == null) {
				throw new NullArgumentException("name");
			}
			BeanFactory factory = this.factoryReference.getFactory();
			return factory.getBean(name);
		} catch (RuntimeException exception) {
			throw exception;
		}
	}

}