Okay, I think I have determined how to work around the Security error.
I am now seeing the following:
System.ServiceModel.FaultException`1[[System.ServiceModel.ExceptionDetail, System.ServiceModel, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]]: Invalid object name 'CuteChat4_Portal'.
System.Runtime.Remoting.Proxies.RealProxy.HandleReturnMessage(IMessage reqMsg, IMessage retMsg) +9464367
System.Runtime.Remoting.Proxies.RealProxy.PrivateInvoke(MessageData& msgData, Int32 type) +345
CuteChat.ServiceClientInterface.ChatService.IRemoteChat.GetPortalInfo(String portalname) +0
CuteChat.RemoteDataProvider.GetPortalInfo(String portalname) +86
CuteChat.ChatDataManager.GetPortalInfo() +73
CuteChat.ChatPortal.get_Info() +45
CuteChat.ChatApi.GetCurrentPortalProperty(String propname) +155