TLabel class not found!?

2007-09-10 03:09:53 PM
when i try to use the .DFM file from a old C++Builder 4 Project
in a new created BDS2006 Project i get the error message:
An exception of the class EClassNotFound with the message
'Class TLabel not found' occured.
(this is not the original message ->translated from german)
I get no more information and when i look at the DFM-File with an
text editor i find many TLabel Objects! And the TLabel Class exists
in other BDS2006 Applications.
How do i find out which TLabel causes the trouble?
Is there a migration tool from old C++Builder 4 Applications to BDS2006?