Problem with the connection from .DAT to .PRT with a family table

Hi everyone,
When I try to integrate a custom family table into IFX, I am unable to select a length, only the thread size.
The parameter LG does not seem to be readable. However, I cannot find any errors in the .PRT or .DAT files.
I have attached my original files.

We works with Creo 8.

Perhaps someone can help me?

Thanks in advance.

Best regards,
Peter