No Remote Disk?

I have my Mac Pro and MBA on my AirPort Extreme The MP is ether, the MBA is WiFi.

I have turned on "DVD or CD Sharing" on the MP. "Remote Disk" does not appear on my MBA.

Any suggestions? Is there an easy way to test network visibility?

 

Well I found it, but not in the expected place.

Remote Disk is supposed to (as noted in all the docs) show up in the Devices area on the left side of a Finder window.

It does not do this on my machine. I can find it, but only by using Go -> Computer, and it's in that list.

Odd