Using com component in webservice

[Jim Allitt]

My webservice makes use of an in-process com server. Until recently this
worked fine. Now when I attempt to instanitiate it, the following exception
occurs:

System.Runtime.InteropServices.COMException (0x800401F7): Some error in
application program

I created a Windows Forms app that instantiates, calls and releases this
component, which worked without any problems whatsoever. Also, the service
builds and test ok on our build machine.

All this leads me to think that both my webservice and com component are ok,
and that the problem must be with my machine.

Can anyone shed any light on this issue?

Thanks,
Jim Allitt