Got Australian Quickbooks?
Showcasing that not all versions are alike
QuickBooks Australia Premier 2012/2013:
Microsoft .NET Framework Common Language Runtime 1.1 (provided on QuickBooks Installation CD. Requires an additional 150MB)
Microsoft .NET Framework Common Language Runtime 2.0 (provided on QuickBooks Installation CD. Requires an additional 150MB.)
.NET 1.1 is the kiss of death on SBS 2011
If you live in Australia keep that QuickBooks install away from that server.