>>Could be a rights issue. Is the dll placed in a subfolder of the root web folder?
>
>Thought about it being a rights issue, but I really don't think that's it. For testing, I placed the dll in the parent folder of the web, the data it uses is in a subfolder of that web. I'll check the rights of the IUSR in that folder for grins.

remember to reregister when moving your dll...