hello everybody!
i'm start studying Dot net so i have much difficult. I hope every help me. thank you very much.
please help me overcome this erro




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 23: "Forms", "Passport" and "None"
Line 24: -->
Line 25: <authentication mode="Windows" />
Line 26:
Line 27: