[Zope] Permissions problems

["Nico De Boer]

I have some problems with adding my new product into a site.
When I want to add my product in my test-folder, it's no problem. But
when I want to add my product in a website, it isn't shown in the Add
a Product list.

I think it is a problem with the Zope-permissions, but I have looked
in several source code and have made it just the same.

This is my __init__.py file:

import FormMail

def initialize(context): 
	try: 
		context.registerClass(
			instance_class=FormMail.FormMail,
			permission='Add MailFormulier',
			constructors = (
				FormMail.FormMail_Add,
				FormMail.manage_FormMail_Add,
				),
			)
	except:
		import sys, traceback, string
		type, val, tb = sys.exc_info()
		sys.stderr.write(string.join(traceback.format_exception(type,
									val,
									tb),
					     ''))
		del type, val, tb

And this are my __ac_permissions:

    __ac_permissions__=(
        ('View management screens', ('manage_main',)),
        ('Change permissions', ('manage_access',), ('Owner', 'Manager')),
        ('Change MailFormulier', ('manage_edit',''), ('Owner', 'Manager')),
        ('View', ('index_html', 'view_form','manage_form'),
         ('Anonymous', 'Owner', 'Manager')),
        )

Can anyone help me solving my problem?