[Zope] Question on manage_pasteObjects

I have a ZClass based on OFS:File. The problem is that I can't paste a instance of that class except that I am a "Manager". In other roles, I get a error message which says that that object(instance of my ZClass) doesn't support the paste operation. The work-around is: to set the proxy role of a wrapper DTML-method ( which calls manage_pasteObjects) to be "Manager". I think this work-around gives too much permissions. It implies that user can paste everywhere, doesn't it? My question : is there any better way or probably right way to do the same thing? ( I have tried to check all permissions for that role in context, well, it doesn't work) Thanks. Yap, Singuan