I finally got my hands on an XC 1.1 installer guide and in it, I saw a small footnote stating that in order to get 2nd expansion card to work you must have 1.1 (or greater). It seems xc 1.0 was to get the companion aspect running, followed by 1.1 for the 12 port capability. I didn`t think it was the cabinet either, but I`m glad I found out before I tried it. I don`t have an upgrade kit, so I would have hated to have to reprogram this switch twice. Thanks for your help Jeter, and I`ll keep my eye on this excellent site and try to help anyone else who might have some troubles.
Schlum