问使用Visual 10和C#使用web服务

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ServiceReference.InformationClient client = new ServiceReference.InformationClient();
client.GetInformation("123");
client.close();

System.ServiceModel.FaultException`1 was unhandled
Message=Oracle Connection is not successful
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 ConsumingWebService.ServiceReference.IInformation.GetInformation(String ID)
   at ConsumingWebService.ServiceReference.InformationClient.GetInformation(String ID) in c:\users\user\documents\visual studio 2010\Projects\ConsumingWebService\ConsumingWebService\Service References\ServiceReference\Reference.cs:line 53
   at ConsumingWebService.Program.Main(String[] args) in c:\users\user\documents\visual studio 2010\Projects\ConsumingWebService\ConsumingWebService\Program.cs:line 13
   at System.AppDomain._nExecuteAssembly(Assembly assembly, String[] args)
   at System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args)
   at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
   at System.Threading.ThreadHelper.ThreadStart_Context(Object state)
   at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
   at System.Threading.ThreadHelper.ThreadStart()