pernahkah anda mengalami error seperti ini

Server Error in ‘/’ Application.

Configuration Error

Description: An error occurred during the processing of a configuration file required to service this request. Please review the specific error details below and modify your configuration file appropriately.

Parser Error Message: It is an error to use a section registered as allowDefinition=’MachineToApplication’ beyond application level.  This error can be caused by a virtual directory not being configured as an application in IIS.

Source Error:

Line 52:             ASP.NET to identify an incoming user. 
Line 53:         -->
Line 54: <authentication mode="Windows"/> Line 55: 		<!--
Line 56:             The <customErrors> section enables configuration

Source File: C:\websikb\web.config    Line: 54

Version Information: Microsoft .NET Framework Version:2.0.50727.5448; ASP.NET Version:2.0.50727.5456

untuk mengatasinya lihat di http://www.youtube.com/watch?v=4t6b5RU8rmk