So looking at your screenshot your RPi is not seeing the AUC adapter that goes inline between the RPi and the miner. Until you fix that part, your Avalon will never be seen.

In the CGminer status page, just under the pools section you will see "Avalon Devices" This is where you should see your AUC adapter, if you do not see the adapter there, you have a cabling or an AUC problem.

Which AUC controller do you have? The smaller shrink wrapped version or the one with the hard plastic outer shell? They react differently so it is important to know which one you have.