I'm trying to load multiple Tiles definitions within one application. My problem is that the last definition overrides any previous one. Here is a sample configuration.

HTML Code:
<!-- WEB-INF/web.xml -->

<servlet>
	<servlet-name>app1-front-controller</servlet-name>
	<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
	<load-on-startup>1</load-on-startup>
	<init-param>
		<param-name>namespace</param-name>
		<param-value>app1/configs/front-controller-servlet</param-value>
	</init-param>
</servlet>
<servlet-mapping>
	<servlet-name>app1-front-controller</servlet-name>
	<url-pattern>/app1/*</url-pattern>
</servlet-mapping>
<servlet>
	<servlet-name>app2-front-controller</servlet-name>
	<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
	<load-on-startup>2</load-on-startup>
	<init-param>
		<param-name>namespace</param-name>
		<param-value>app2/configs/front-controller-servlet</param-value>
	</init-param>
</servlet>
<servlet-mapping>
	<servlet-name>app2-front-controller</servlet-name>
	<url-pattern>/app2/*</url-pattern>
</servlet-mapping>

<!-- WEB-INF/app1/configs/front-controller-servlet.xml -->

<bean class="app1.controller.AppController" />
<import resource="mvc.xml" />

<!-- WEB-INF/app2/configs/front-controller-servlet.xml -->

<bean class="app2.controller.AppController" />
<import resource="mvc.xml" />

<!-- WEB-INF/app1/configs/mvc.xml -->

<bean id="app1TilesViewResolver" class="org.springframework.web.servlet.view.tiles2.TilesViewResolver">
	<property name="order" value="0" />
</bean>
<bean id="app1TilesConfigurer" class="org.springframework.web.servlet.view.tiles2.TilesConfigurer">
	<property name="definitions">
		<list>
			<value>/WEB-INF/app1/configs/tiles.xml</value>
		</list>
	</property>
</bean>
<mvc:annotation-driven />

<!-- WEB-INF/app2/configs/mvc.xml -->

<bean id="app2TilesViewResolver" class="org.springframework.web.servlet.view.tiles2.TilesViewResolver">
	<property name="order" value="0" />
</bean>
<bean id="app2TilesConfigurer" class="org.springframework.web.servlet.view.tiles2.TilesConfigurer">
	<property name="definitions">
		<list>
			<value>/WEB-INF/app2/configs/tiles.xml</value>
		</list>
	</property>
</bean>
<mvc:annotation-driven />

<!-- WEB-INF/app1/configs/tiles.xml -->

<tiles-definitions>
	<definition name="app1.layout" template="/WEB-INF/app1/layouts/application.jsp">
		<put-attribute name="title" value="Application 1" />
	</definition>
</tiles-definitions>

<!-- WEB-INF/app2/configs/tiles.xml -->

<tiles-definitions>
	<definition name="app2.layout" template="/WEB-INF/app2/layouts/application.jsp">
		<put-attribute name="title" value="Application 2" />
	</definition>
</tiles-definitions>
In my controller I can access 'app2.layout' but trying to use 'app1.layout' throws "javax.servlet.ServletException: Could not resolve view with name 'app1.layout' in servlet with name 'app1-front-controller'".

How can I solve this problem?