I have an ISAPI DLL written in Delphi 6 which calls a .Net DLL written in C#. I have it installed and running fine on a Windows 2003 Server running IIS6, however, in the new test environment running Windows 2008 server and IIS 7 I get an OLE exception in that it can't find the .net DLL. The .Net DLL is installed on both systems the same; The DLL is in the same folder off the C drive and was registered using REGASM.exe. In addition, the DLL was installed in the GAC (drag n drop to the Windows\Assembly folder). Were there some security changes with Server 2008 and/or IIS 7 that would prevent this setup (same for both Windows 2003 and Windows 2008 environments) to work? Thanks.