Archicad 8.1 to Plotmaker 9.0

[rjwilden]

I am finishing off a project in 8.1 and have been importing all the viewsets into Plotmaker 9.0.
The problem is none of my details are cross referencing with the detail marker on my sections/elevations. The detail markers are set up as per usual, but nothing Ive tried fixes the problem.
However I did create a new detail number in 8.1 and imported it into plotmaker and this did cross reference.
Does anyone know whats going on here.

Richard
Widows XP
Archicad 9.0