我是接手别人的一个项目,他的方法可以调用,并且正确.. 我新添加进去的方法,在别的client可以调用,但是报异常..

错误信息如下：看不懂的想办法翻译一下吧..

System.ServiceModel.ActionNotSupportedException was unhandled by user code
  Message="The message with Action 'GetddlistData_Cla' cannot be processed at the receiver, due to a ContractFilter mismatch at the EndpointDispatcher. This may be because of either a contract mismatch (mismatched Actions between sender and receiver) or a binding/security mismatch between the sender and the receiver.  Check that sender and receiver have the same contract and the same binding (including security requirements, e.g. Message, Transport, None)."
  Source="mscorlib"
  StackTrace:
    Server stack trace:
       at System.ServiceModel.Channels.ServiceChannel.ThrowIfFaultUnderstood(Message reply, MessageFault fault, String action, MessageVersion version, FaultConverter faultConverter)
       at System.ServiceModel.Channels.ServiceChannel.HandleReply(ProxyOperationRuntime operation, ProxyRpc& rpc)
       at System.ServiceModel.Channels.ServiceChannel.Call(String action, Boolean oneway, ProxyOperationRuntime operation, Object[] ins, Object[] outs, TimeSpan timeout)
       at System.ServiceModel.Channels.ServiceChannel.Call(String action, Boolean oneway, ProxyOperationRuntime operation, Object[] ins, Object[] outs)
       at System.ServiceModel.Channels.ServiceChannelProxy.InvokeService(IMethodCallMessage methodCall, ProxyOperationRuntime operation)
       at System.ServiceModel.Channels.ServiceChannelProxy.Invoke(IMessage message)
    Exception rethrown at [0]:
       at System.Runtime.Remoting.Proxies.RealProxy.HandleReturnMessage(IMessage reqMsg, IMessage retMsg)
       at System.Runtime.Remoting.Proxies.RealProxy.PrivateInvoke(MessageData& msgData, Int32 type)
       at ServiceSupply.CustomerService.WebDBData.GetddlistData_Cla()
       at ServiceSupply.CustomerService.WebDBDataClient.GetddlistData_Cla() in F:\Kay_VSS_workspace\Ax_Web_0005\AX_Web_Portal.root\WintecEC.root\WintecEC\ServiceSupply\Service References\CustomerService\Reference.cs:line 7237
       at VenderPortal.newVenderportal.ddlistDatabindcls() in F:\Kay_VSS_workspace\Ax_Web_0005\AX_Web_Portal.root\AX_Web_Portal\Ax_Web_0005_Vender Portal\newVenderportal.aspx.cs:line 198
       at VenderPortal.newVenderportal.Page_Load(Object sender, EventArgs e) in F:\Kay_VSS_workspace\Ax_Web_0005\AX_Web_Portal.root\AX_Web_Portal\Ax_Web_0005_Vender Portal\newVenderportal.aspx.cs:line 21
       at System.Web.Util.CalliHelper.EventArgFunctionCaller(IntPtr fp, Object o, Object t, EventArgs e)
       at System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e)
       at System.Web.UI.Control.OnLoad(EventArgs e)
       at System.Web.UI.Control.LoadRecursive()
       at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
  InnerException: