Peter,

I ran into a similar problem. (I have one Apple and a few PCs) I called Apple and got kicked up two help levels and somebody showed me how to manually connect via the drive's ip and then place a drive (or share) icon on my doc. Now if I can't access the disk I just got to the icon... but I can't remember how I got it there. Also, a day after the issue was resolved it started appearing in my share list on its own...