Currently Being ModeratedFeb 2, 2013 7:39 AM (in response to Hildor)
I found the answer in this archived post:
Basically, I did two things:
Went to AirPort Utility >> Disks, clicked on the name of the disk, which was Michael's Time Caps, and renamed it MikeTimeCap
I also disabled the guest network.
Now backing up for the first time in a week or so.