Gracias a los dos. Seb aqui te pongo el error completo como lo pediste
Server Error in '/neo' Application.
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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 26: ASP.NET to identify an incoming user.
Line 27: -->
Line 28: <authentication mode="Windows"/>
Line 29: <!--
Line 30: The <customErrors> section enables configuration
Source File: C:\Documents and Settings\nfermin\My Documents\webAppFarm\denis\web.config Line: 28
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Version Information: Microsoft .NET Framework Version:2.0.50727.42; ASP.NET Version:2.0.50727.210
Y Yesmina prometo provar y avisarte
Cualquier cosa le aviso
y gracias