http://blogs.iis.net/hosterposter/archive/2006/03/22/Enabling-WebPermission-in-Medium-Trust.aspxThe goal of Code Access Security (CAS) is to reduce the attack surface by enabling applications to run with minimum required permissions to function. In ASP.NET 1.1 there were some limitations in enabling oleDB access in a partial trust setting basedenCommunityServer 2007 SP1 (Build: 20510.895)