Visual Studio generated .exe [on hold]

I'm having a problem, the application executed from visual studio works well but if I execute .exe from /debug/app.exe and /release/app.exe it is having problem when is trying consume a web service, the error es "unknown", any suggestions?

Server Stack Trace:
at System.ServiceModel.Channels.ServiceChannel.HandleReply(ProxyOperationRuntime operation, ProxyRp& rpc)
at System.ServiceModel.Channels.ServiceChannel.Call(String action, Boolean oneway, ProxyOperationRuntime operation, Object[] ins, Object [] outs, TimeSpan timeout
at System.ServiceModel.Channels.ServiceChannelProxy.InvokeService (IMethodCallMessage methodCall, ProxyOperationRuntime operation)
at System.ServiceModel.Channels.ServiceChannelProxy.Invoke(IMessage message)