Loading COM components in your Web Service

I ran into an issue the other day where my Silverlight Mobile App was calling my web service that was trying to load a COM component. Ran fine when debugging locally under Cassini. However, once deployed to IIS, loading the COM component failed with the following error: "Retrieving the COM class factory for component with CLSID {D6567EF8-0A6C-48E7-9288-A2463123C2F3} failed due to the following