Formula One Error (unspecified error)

I wrote an application (with Delphi 4 update 1)  using the Formula One
On some machines, I get an "unspecified error" when I create the form
with the VCF1 component.
I installed the recent files (VCF132.OCX, MFCANS32.DLL, OC30.DLL,
MSVCRT32.DLL) which are listed in the VCF1 help file.

After installing Delphi 4 on this machine, all works fine. After
re-installing Delphi, the program still works.

Can anyone tell me which other files do I have to update?