Error when calling custom service

Hi,

I called a customer service by C# and i'm getting this error:

System.ServiceModel.CommunicationException: 'An error occurred while receiving the HTTP response to
url/soap/services/XXCustServices.
 This could be due to the service endpoint binding not using the HTTP protocol.
This could also be due to an HTTP request context being aborted by the server (possibly due to the service shutting down).