[Zope] operation from server only?!

[Tony Flanagan]

I've been having a problem with the YihawDirectory product for over a week
and I seriously need help, going demented!. The problem I am having is that
the only way for me to add EventItems is from the machine hosting Zope, when
I try to do it from any of the other machines on the network I receive an
error "global name 'YihawEventsItem' is not defined". I don't understand how
this operation is restricted to the one machine PLEASE can someone point me
in the right direction. TIA
Tony