[NTG-context] Pagenumbers doublesided

[Markus Finke]

Hi,

I can’t get simple pagenumbers starting right-left-right-etc.

This minimal example results in middle pagenumbers (ConTeXt ver: 
2012.04.19):

-------------------------------------------------------------------

\setuppagenumbering [ alternative=doublesided,
                          location=marginedge ]
\starttext
\dorecurse{20}{\input knuth \par}
\stoptext

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This solution doesn’t work for me (How to used it? – I copied the code 
in my preamble):

http://archive.contextgarden.net/message/20120202.175424.41cbe6f3.en.html#context

TIA!