I'm having the same problem. When I try to link, the link window just disappears after a few seconds. No error, it just goes away.
There is no diagnostics tab, but I did find diagnostics under tools. There, it says the PLM Info/Status is "Not Connected"
I've swapped three different network cables, and the result is the same. Do I need to re-start the console or something or reboot every time I try a different cable?
This is a new PLM that I've never used before, bought it along with the ISY-99i.
Thanks for help!
-Dane