[NTG-context] How to include animation into pdf

Hello All, I made a little animation with Asymptote (http://asymptote.sourceforge.net) which is self contained in a single pdf. The reason of using Asymptote is, that it produces a single pdf without having to combine the resulting pdf's files myself. I now want to include this animation into my main document with the help of \externalfigure[animation.pdf] \setupcolors[state=start] \setupinteraction[state=start] \starttext \externalfigure[animation.pdf] \stoptext Alas I don't see my animation, to be honest I did not expect it to work, but I thought I give it a try. Thanks Wim