[Zope] namespace and PARENTS doubt

Hi again That may be a simple doubt but that´s it: <dtml-with "_.namespace( parameter = 'folder1' )"> <dtml-with "_['PARENTS[1].' + _['parameter'] + '.folder']"> .... 'commands' .... </dtml-with> </dtml-with> The above statement just doesn´t work. The 'parameter' is a DTML variable in the global namespace. But if I try: <dtml-with "PARENTS[1].folder1.folder"> </dtml-with> That will work. What I am trying to do is to execute the ".... 'commands'....." above for lot´s of 'parameter' folders. But the _['PARENTS[1].' + 'something'] trick doesn´t work. Is there another way to make the first statement work? (maybe I was a bit confusing here, I hope you understand the problem) Regards