[Zope] <dtml-var aaa> vs. <dtml-var "aaa"> question

[Michael Lausch]

can anybody explain me why the following is happening:

if i have a DTML Method m1 in the folder f1/f2/m1 and i write
<dtml-var f1.f2.m1> this does not work. AFAIK the `.' operator needs
to much priviledges in this context.

<dtml-var "f1.f2.m1"> works, but the DTML output is not rendered, but
displayed as text like:

<standard_html_header><h2>........

so i'm using this construct for now:
<dtml-with f1>
  <dtml-with f2>
    <dtml-var m1>
  </dtml-with>
</dtml-with>


My question is why's <dtml-var "f1.f2.m1"> not rendered?