c# - Connecting to the server machine 'wsbeta.fedex.com' failed -

i want start using fedex web service, downloaded sample code putted in site "fedex.com" developers. folowing error occured:

unable automatically step server. connecting server machine 'wsbeta.fedex.com' failed. may because remote computer not exist or firewall may preventing communication remote computer

it occured @ line:

processshipmentreply reply = service.processshipment(request); 

i use c#

thank you,

i fixed problem, occurred because did not put correct account number in line:

request.requestedshipment.shippingchargespayment.payor.responsibleparty.accountnumber = "client's account number";

thank james,

best regards