[NTG-context] Refering to point inside external pdf file?

Hi ConTeXt User's, I'm struggling with references to external PDF files using the \useexternaldocument command. Refering to the document works fine, but pointing at a specific location inside the file using for example \in{chapter}[logicalfilename::theverylocation] doesn't seem to work! Feature is described in "ConTeXt an excursion", page 64 (paper version)! Regards, Gerard Verhaag P.S. Currently I use ConTeXt ver: 2011.12.23 09:52 MKIV fmt: 2011.12.27