Wordperfect 6.0/6.1 for Windows

Recurring problem.
When upgrading computers, I am called upon to transfer programs and data between older machines and newer ones.
Most apps seem to copy OK.
The problem is Wordperfect 6.0 & 6.1 for Windows.
I transfer the appropriate directories, the files located in Windows and Windows/System directories (all of them I think), the Win.Ini entries.
Trying to start Wordperfect, I get message
Shared Components DLL cannot be loaded.
What am I missing?