USING COM OBJECTS FROM ASP.NET

I got the following question yesterday:Hi, I created a web application in which I am generating a ms-word document using Microsoft.Office.Interop.Word dll. The application is running fine in the visual studio but when I tried to run on IIS 5.0 through virtual directory then its giving the following error – Retrieving the COM class factory for component with CLSID {000209FF-0000-0000-C000-