samba - Mar 2007 - Server Does Not Appear In My Network Places

We have two RHEL 4 servers with Samba configured and running.  The 
Samba configurations are basically identical (obvious revisions made).  
The first server appears in My Network Places under Entire 
Network/Microsoft Windows Network/Workgroup, the second does not.  The 
reason for this may help explain another issue we're facing.  Can 
someone tell me why the one server would not appear in My Network 
Places the same as the other?

Thank you.