.net COM +返回IDataReader的对象

I've created a .net class derived from ServicedComponent and registered it with COM+. The interface that this component implements has a method that returns an IDataReader. When I call the serviced component from my client application everything works I can call the method that returns the IDataReader no problem but as soon as I call a method on the object I get the exception: "System.Runtime.Remoting.RemotingException : This remoting proxy has no channel sink which means either the server has no registered server channels that are listening, or this application has no suitable client channel to talk to the server."I've created a .net class derived from Serviced