[Zope] ZClass and external Methods

[Vincent]

Hi,

I just would like to call from a DTMl document an external method defined in
a ZClass.
   - I created an instance of this ZClass  -> Ztest (for example),
   - But I can't call the external method : -> <dtml-call
"Ztext.myMethod(Arg1)">
If somebody knows where I am wrong ;-)

Thansk again

Vincent