>Thanks Gary. The .TLB file is there. It resides in the same directory as the .DLL. Am I missing something else?

I'm not sure. I was thinking the TLB file only because I had the same message recently when transfering a COM server to another machine and forgot the TLB file. I spent almost a day before remembering the TLB. I have had problems with this error or a similar one when machines had differnt language settings, e.g., an exe loads fine under American English but chokes under UK English. I'm sure that isn't your problem, I assume all your machines are set to UK English. Sorry, out of ideas.

Gary Foster
Pointsource Consulting Inc.