[Zope] My z Class

I am having problems adding images to my z class I am creating a Z class for a staff profile...I have added an image to the methods of the class. When editing and creating a new profile object I use the following syntax <dtml-call "propertysheets.photo.manage_changeProperties(title= REQUEST['new_title'] + REQUEST['new_name'], data=REQUEST['new_photo'])"> It changes to the MYProfileClass_add_form take place. When I call the above code in the add method......I get an error telling me I do not have access to theMYProfileClass object.. Please I would like some help on how to include other objects in my Z class and how to edit the properties of the included objects. Payng attention to the image example