Collaboration test environment problem

[James Simmons]

I have two PCs running Fedora 10 and the Sugar RPMs that come with 
that.  One of the computers runs GNOME and the other uses Window Maker.  
I run sugar-emulate on both.  One copy of Sugar uses the name "jim" and 
the other uses "jsimmons".  Both use the schoolserver.media.mit.edu 
jabber server.  Both are connected to the same router using Ethernet cables.

When I go to the neighborhood view (F1) on both I see a number of 
"buddies".  However, while on the "jim" machine (Window Maker) I can see 
and invite "jsimmons".  When I look at the same view on "jsimmons" 
(GNOME) I  cannot see user "jim", although I can see other users.  So 
one can see the other, but not vice versa.  I had used the same machines 
on the same network to test collaboration in the past and it worked.  At 
that time one was using Xubuntu installed from the Xubuntu Live CD and 
the other was using openSUSE 10.2 and sugar-jhbuild.

I can't test and develop collaboration until I get these machines to 
both see each other and I don't know where to begin.  I'd be grateful 
for any suggestions.

Thanks,

James Simmons