The request failed with HTTP status 401: Non-Autorisé.

i create a process in workbench

i callit via a soap in my dotnet project with this url :

http://name_serveur: port/soap/services/Name_process?wsdl

when i add this as a web reference it runs ok.

for invoking it i write this :

ProcessService

essaiOutput = newProcessService();

essaiOutput.invoke(

"c:\\creerPdf", "BonCmdeDynamiq.xdp",out outResult,out generatePDFOutputResultDoc);

but when i execute it on a browser i have an error :

the request failed with http status 401 : non autorisé

is anybody know what is the problem?