java后台+flex Cirangorm框架交互

[color=darkred][/color][size=x-large][/size][align=center][/align]创建一个flex项目，添加了cairngorm3.0的swc文件，利用cairngorm框架做个从后台查询数据库里的数据，然后在视图上显示

但是，出来时报错，下面是报错信息：

TypeError: Error #1006: faultHandler 不是函数。
        at com.potevio.cairngorm.business::Services/__userRO_fault()[D:\myproject\CairmgormTest\flex_src\com\potevio\cairngorm\business\Services.mxml:7]
        at flash.events::EventDispatcher/dispatchEventFunction()
        at flash.events::EventDispatcher/dispatchEvent()
        at mx.rpc::AbstractService/dispatchEvent()[E:\dev\4.x\frameworks\projects\rpc\src\mx\rpc\AbstractService.as:333]
        at mx.rpc.remoting.mxml::RemoteObject/dispatchEvent()[E:\dev\4.x\frameworks\projects\rpc\src\mx\rpc\remoting\mxml\RemoteObject.as:148]
        at mx.rpc::AbstractOperation/http://www.adobe.com/2006/flex/mx/internal::dispatchRpcEvent()[E:\dev\4.x\frameworks\projects\rpc\src\mx\rpc\AbstractOperation.as:254]
        at Function/http://adobe.com/AS3/2006/builtin::apply()
        at mx.rpc::AsyncDispatcher/timerEventHandler()[E:\dev\4.x\frameworks\projects\rpc\src\mx\rpc\AsyncDispatcher.as:50]
        at flash.utils::Timer/_timerDispatch()
        at flash.utils::Timer/tick()

service.mxml是remoteObject的配置文件

<?xml version="1.0" encoding="utf-8"?>
<cairngorm:ServiceLocator
        xmlns:mx="http://www.adobe.com/2006/mxml"
        xmlns:cairngorm="com.adobe.cairngorm.business.*">
       
        <!--定义remoteObject的各项参数和方法-->
        <mx:RemoteObject
                id="userRO"
                destination="userService"
                showBusyCursor="true"
                result="event.token.resultHandler( event );"
                fault="event.token.faultHandler( event );">
        </mx:RemoteObject>
</cairngorm:ServiceLocator>


我的delegate.as如下获取service，并且调用后台方法：
package com.potevio.cairngorm.business
{
        import com.adobe.cairngorm.business.Responder;
        import com.adobe.cairngorm.business.ServiceLocator;
        import com.potevio.cairngorm.model.SaveUserLocator;
       
        import mx.rpc.AsyncToken;
        import mx.rpc.IResponder;
        import mx.rpc.events.*;

        public class ShowUsersDelegate
        {
                private var responder:Responder;
                private var userModel:SaveUserLocator = SaveUserLocator.getInstance();
                private var serviceLocator:ServiceLocator = ServiceLocator.getInstance();
                private var userService:Object;
               
                public function ShowUsersDelegate(iresponder:Responder)
                {
                        this.responder = iresponder;
                }
               
                public function getUsers():void{
                        this.userService = this.serviceLocator.getRemoteObject("userRO");
                        var call:AsyncToken = this.userService.getUsers();
                        call.resultHander = responder.onResult;
                        call.faultHander = responder.onFault;
                }
        }
}


remoting-config.xml配置如下：
<?xml version="1.0" encoding="UTF-8"?>
<service id="remoting-service"
    class="flex.messaging.services.RemotingService">

    <adapters>
        <adapter-definition id="java-object" class="flex.messaging.services.remoting.adapters.JavaAdapter" default="true"/>
    </adapters>

    <default-channels>
        <channel ref="my-amf"/>
    </default-channels>
   
    <destination id="userService">
         <properties>
             <source>com.potevio.service.userImpl.UserService</source><--------UserService是Java后台的一个类--------->
         </properties>
    </destination>
</service>


请问，我这是哪里出问题了，为什么不能够正常执行呢？

是配置文件的问题吗？

我现在很纳闷4.0的service.mxml的remoteObject的配置方式以及在delegate内如何调用？

劳烦高手相告！