"Local Activation permission" Problem when trying to access application

[ElGordo]

I have a routine which opens a command shell and runs an executable.

This all worked fine until recently, and I noticed that each time the
statement is run, an event is logged in the event viewer stating:

______
The machine-default permission settings do not grant Local Activation
permission for the COM Server application with CLSID
{CLS-ID}
to the user ASPNET SID (ID). This security permission can be modified
using the Component Services administrative tool.
______

This references the CLS-ID of the command line program I execute (a file
extraction utility).

However, when I try to grant the appropriate this program the permissions in
Component Services / DCOM Config, it isn't listed!

Does the error mean that the ASPNET user account cannot execute the program?

If so, how can I remedy this if XP does not even list it in the DCOM Config
UI?

Should I be looking somewhere else?

Help!

Running: XP Pro / SP2