Lightbox macro in Typo 4.1.1

A question about lightbox functionality: I’m using a scribblish-based
theme on a web site, and have the <%= page_header %> declaration, as
required.

Using the standard syntax per the macro documentation:

<typo:lightbox src="/files/myimage.png"
thumbsrc="/files/myimage-thumb.png"/>

…does not extrude beautiful pop-up images in all their glory; on the
contrary, the macro doesn’t appear to be expanded at all, and appears
in the dcument verbatim. This, of course, means the lightbox stuff
doesn’t work. What, then, am I missing?

Rodger D. <rodgerd diaspora.gen.nz> writes:

…does not extrude beautiful pop-up images in all their glory; on the
contrary, the macro doesn’t appear to be expanded at all, and appears
in the dcument verbatim. This, of course, means the lightbox stuff
doesn’t work. What, then, am I missing?

I’m wondering if this is related to a similar problem I reported
recently with
typo:code…</typo:code> filters?

If you create a page containing something like:

typo:code
int main()
{
return 0;
}
</typo:code>

then does the typo:code macro get expanded? (Sorry, I don’t have a more
helpful
answer to the question!)