Server Error in '/' Application.

[cenerix]

Ciao a tutti, premetto che non ho mai avuto occasione di lavorare con joomla; mi sono appena registrato perché ho un problema con un sito.
Mi hanno chiesto di risolvere un problema su un hosting windows dove vi è joomla; appena ci si reca sull'indirizzo viene visualizzato questo errore:


Server Error in '/' Application.
[/size][/color]Parser ErrorDescription: An error occurred during the parsing of a resource required to service this request. Please review the following specific parse error details and modify your source file appropriately.

Parser Error Message: Could not load file or assembly 'System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' or one of its dependencies. The system cannot find the file specified.

Source Error:

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[No relevant source lines][/font][/color][/size][/color][/size][/font] Source File: none    Line: 0 Assembly Load Trace: The following information can be helpful to determine why the assembly 'System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' could not be loaded. WRN: Assembly binding logging is turned OFF. To enable assembly bind failure logging, set the registry value [HKLM\Software\Microsoft\Fusion!EnableLog] (DWORD) to 1. Note: There is some performance penalty associated with assembly bind failure logging. To turn this feature off, remove the registry value [HKLM\Software\Microsoft\Fusion!EnableLog].[/color][/size][/font] Qualcuno mi potrebbe dare una mano? Grazie in anticipo.