Yes, I ordered the USB. I have a brand new serial but I decided to go with the USB to simplify things. The one I'm using is also USB but it's not dual mode and I was difficult to get the eisy to recognize it. I used SSH to look at the /dev directory and it showed up there but for some reason the admin console PLM status showed it as disconnected. I used a different USB port and it started working. I don't trust it so I'll go ahead and replace it before I get too carried away. Everything works eventually so I can live with it for a few days. Thanks again for your help.