Microsoft.Jet.OLEDB.4.0' provider is not registered on 64bit IIS7 server
When loading an ASP.NET 3.5 web application that has been compiler for Any CPU onto an IIS7 server I got the error
The 'Microsoft.Jet.OLEDB.4.0' provider is not registered on the local machine.
This was because the server was running a 64bit OS and only the 32bit Access Driver was installed. The quick fix to get this running was to enable 32-bit applications on the AppPools advanced settings.
Read the complete post at http://blogs.blackmarble.co.uk/blogs/rfennell/archive/2011/02/18/microsoft-jet-oledb-4-0-provider-is-not-registered-on-64bit-iis7-server.aspx