Code:
Server Error in '/' Application.
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The 'Microsoft.Jet.OLEDB.4.0' provider is not registered on the local machine. 
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. 

Exception Details: System.InvalidOperationException: The 'Microsoft.Jet.OLEDB.4.0' provider is not registered on the local machine.
You will get this error on Windows Server 2008 R2 or Windows 7 64 bit. To fix it, switch your Application Pool from Native 64 bit to 32 Bit more under Advanced Settings.

If you are ASPnix client and getting this error on one of our servers please submit a ticket with request to change your Application Pool to 32 bit mode and include your domain and URL so we could see the error.

It is also suggested that you upgrade your application to new ACE OLEDB provider, you can download it here: http://www.microsoft.com/downloads/d...displaylang=en