SBS 2011 and .NET Framework 1.1

By brendon on February 6th, 2012

<sigh> New SBS 2011 Essentials server and customer just HAS to install QuickBooks with .NET 1.1 </sigh>

Thanks to several posts on the SBS Diva Blog I was able to identify the issue and fix it in a slightly different way.

All web sites hosted (http://server/Remote, /Connect, etc.) were reporting the following HTTP 500.0 server error -
“Calling LoadLibraryEx on ISAPI filter “C:\Windows\Microsoft.NET\Framework\v4.0.30319\\aspnet_filter.dll”

Is obviously caused by x64 code being executed by x32 .NET – Enabling x32 compatibility in the Application Pool did not help. To resolve:

Under the <Server> Home – ISAPI Filters, ASP.NET_4.0.30319.0 was set to use x32 Framework. Updated the filter DLL path to Framework64 and all applications are working normally.