ActiveX component can't create object

Hi:
I have a standard exe calling an ActiveX Exe. The problem is when i build a setup package (Visual studio 6 - Package & Deployment Wizard) and install it on a machine, it gives

Error 429 :ActiveX component can't create object

Installing the same package on a couple of other machines does not give any problem.
I have tried unregistering the ActiveX exe and then registering it.
Could any one help?
Thanks.

[Scuzy]

You probably have a missing .dll file on the machine that your app is not working correctly. Or possibly one that did not register correctly. I have had the same problem in the past. Try comparing the system directories or shared directories where vb installs its files of a computer that works and one that does not and see if you notice any differences. Try to add .dll's manually that do not appear in the computer that doesn't work by copying them from ones that do. Hope this helps...