Soap Exception Error when calling ASP.NET Web Service from SAP

In one of my recents projects i had to call an ASP.NET Web Service from SAP.

Although i called the web service passing the corrects credentials i got SOAPEXCEPTION(Soap Fault Code 1) error

After searching several hours i found that when i configure the authentication mode of my application using Basic Authentication it work fine...

For more details about IIS authentication mode: http://msdn.microsoft.com/en-us/library/aa292114(VS.71).aspx

WebService "Service Unavailable" Error

If you get "Service Unavailable" error message when you trying to run webapplication, check the follows issues:

• The application pool is not running.
• The application pool account uses an incorrect password.
• The application pool account is not a member of both the IIS_WPG group and the STS_WPG group on the server.

Thanks to liron for it post : http://lirliron.blogspot.com/2009/03/webservice-service-unavailable-error.htm