Zend框架:将模块设置为子域

我想创建路由以获取链接,如:

• my.site.com(/:controller/:action)
• admin.site.com(/:controller/:action)

我试图补充:

resources.router.routes.www.type = "Zend_Controller_Router_Route_Hostname"
resources.router.routes.www.route = ":module.nameofmysite.com"
resources.router.routes.www.defaults.module = "default"
resources.router.routes.www.chains.index.type = "Zend_Controller_Router_Route"
resources.router.routes.www.chains.index.route = ":controller/:action/*"
resources.router.routes.www.chains.index.defaults.controller = "index"
resources.router.routes.www.chains.index.defaults.action = "index"

我已经阅读了zend的文档,但是我仍然无法让它工作。