Microvellum Community

Problems Importing PDF

Hi All
Over the last couple of months when I have wanted to import a PDF to pull details on to a shop drawing or in to a model space I have been coming up with a Unsupported DGN file (only V7 and V8 files are supported)
I looked around but can not find a clear answer as to why this will not works. is it a layer Issue?

Any one having the same issue and found a fix?

Cheers