Debuggin ISAPI dll in delphi 2006 fails when dll instatiated via COM

[tameza]

We have a delphi ISAPI dll web app that runs in IIS. The application allows extensions via a COM object that ASP pages can instantiate (the com object resides within the ISAPI dll). When we are debugging, as soon as an ASP page is called that instantiates the COM object debugging fails, no more breakpoints will work.This problem only presents itself in Windows 7. Debugging on windows XP works fine. (Problem is we cannot continue to develop on XP!) Any insight into what might be causing this would be appreciated.Note we are using Delphi 2006