[Zope] Form-Submit

I want to call a form within a method. The address is submitted with the REQUEST. Using <dtml-var address> only shows the content of address. or <dtml-call address> shows only an emtpy screen I have tried it with or without quotation mark. Manuelly calling <dtml-var "main.sub.detail.formular">(which is the content of address) works fine. Changing the address in "main/sub/detail/formular", doesn't change the behavior. Please tell me how to handle this. Axel