receivers won't communicate with central

The central has been upgraded, display shows "Version 1.10-rc1 (build 23)" The central is plugged into a linksys usb100tx and then plugged into a linksys 4 port hub. I have a "true" rio receiver and a dell rebadged receiver also plugged into the hub. I cannot get either one to see the central. The hub lights up for all 3 ports. I have set the central to the automatic configuration and clicked the box "serve receiver units", any ideas?

Steve

I just reloaded the 1.02 software, just to make sure that all of the hardware is working correctly and the sonic blue receiver is communicating with the central now, the dell is not, as expected.

GOT IT!!
I started the process over, from downloading the image, to burning, etc.
Now it works, not sure what mistake I made the first time.
Steve