WCF/WF - HTTP Error

The request failed with HTTP status 401: Unauthorized
I am getting this error while calling Webservice from my Windows Application....
Can anyone solve it ?

web service require any authentication? In that case the web service will return a 401, when no credentials are provided.

authentication on the web service you can use something like the following from .Net
WebServiceProxy proxy = new WebServiceProxy();
proxy.Credentials = CredentialCache.DefaultCredentials;
// make the call on the proxy

Hi Brijesh,
Here's a few links that may be able to help you with your problem:
http://support.microsoft.com/default.aspx?scid=kb;en-us;811318
http://www.dotnet247.com/247reference/msgs/14/70234.aspx
http://www.dotnet247.com/247reference/msgs/56/281810.aspx
Hope this helps.

You have two choices:
1. Enable anonymous access.
You can do this by:
a. In Administrative Tools double click on IIS.
b. Right click on the Web Service you have developed.
c. Click on Properties.
d. Click on Directory Security Tab.
e. In Authontication & Security Box, click on Edit Button.
f. Click on Enable anonymous access.
2. Authenticate yourself to the Web Service.
I'm assuming that you added a reference to the Web Service in your
Windows Application, Windows Service, Web Application or Console
Application. Also, I'll assume that the name of the Web Service is WS.
WS.Service1 svc = new WS.service1();
svc.Credentials = new System.Net.NetworkCredential("myUserId",
"myPassword");
svc.PreAuthenticate = true;
try{int sum = svc.Sum(1, 1);}catch(Exception ex){Console.WriteLine(
ex.Message)}
hope is helps you

if ur http post and http get are enabled
what's the protocol you are using ?