Article ID: 914836 - Last Review: May 8, 2006 - Revision: 1.1 Error message when you try to start Microsoft Speech Server: "A call failed because SES URL http://127.0.0.1/SES/Lobby.asmx could not be found"SYMPTOMSWhen you try to start Microsoft Speech Server, you receive the following error message in Microsoft Windows Event Viewer: A call failed because SES URL 'http://127.0.0.1/SES/Lobby.asmx' could not be found. Please ensure that the TAS SpeechServer property is correct. The following error was returned: 80131509: "The request failed with HTTP status 401: Unauthorized. (System.Net.WebException)"
CAUSEBy default, Integrated Windows authentication is disabled if you install Microsoft Windows Server 2003 Service Pack 1 (SP1) as part of a slipstream installation of the Windows Server 2003 operating system. However, Integrated Windows authentication appears to be enabled in Microsoft Internet Information Services (IIS) Manager. Integrated Windows authentication must be enabled on IIS for Speech Server to contact the Speech Engine Service (SES). RESOLUTIONTo resolve this issue, manually disable and then re-enable Integrated Windows authentication in IIS Manager. To do this, follow these steps:
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