Sorry...Again I am stumped.

I have a counter that I'd like to reset


\newcounter \nuggetnumber
\def \numberofnuggets{0}

\definehead [nugget] [section]
\setuphead [nugget] [number=yes,page=yes, before=\increment \nuggetnumber,
    after=\savecurrentvalue \numberofnuggets{\countervalue{nuggetnumber}},]
% LO as nugget

This counts the number of nuggets.. and seems to work fine.

But when it gets to an episode it should reset....so, maybe like this

\definehead [episode] [title]
\setuphead [episode] [numberstyle=bold, textstyle=cap, number=yes,before=\resetnumber[nuggetnumber]]
% may be used


But \resetnumber[nuggetnumber], where-ever I put it seems to have no impact. I think the Wiki suggests that it should, and the mailing list back catalogue and the manual shed no light on the matter....



while I am at it, I am equally unsure how to reset the numberofnuggets accumulator, which should also be done on meeting the episode structural  element - I'd like to insert a whole chain of commands in the 
before=...'


Thanks
Ian