[Zope] constructor product in Zope 2.8.1

Hi, I have the following constructor for an external product I build. def manage_addEba(dispatcher, id='eba', title='Title here',REQUEST=None): "Add a Basis element to a folder." nEba=eba(id,title) dispatcher.Destination()._setObject(id, nEba) if REQUEST is not None: dispatcher.manage_main(dispatcher,REQUEST) manage_addEbaForm = DTMLFile('dtml/manage_addEbaForm', globals()) We are upgrading to Zope 2.8.1. Now I get the follwing error when I try to add the product (eba). Error Type: TypeError Error Value: unbound method manage_addEba() must be called with eba instance as first argument (got str instance instead) Can anyone shed some some light on this? Thanks, Henny