Time Capsule stopped backing up after Mountain Lion install

Rugbyplayer said:

It has worked perfectly for years, but after installing ML Ive had trouble. I was able to do a repair with Drive Genius once, but now DG cant find it either.
I keep getting this message:
The backup disk image “/Volumes/Derek Coke-Kerr's Time Caps/Derek Coke-Kerr’s Computer.sparsebundle” is already in use.
and I can't do anything to find Time Capsule through preferences. Any help would be very welcome.

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I keep getting the same message, i'm gonna try some stuff today and ill let you know if it works or not.

Update:

I solved the problem by turning off my computer, unplugging it from the wall. Then went over to the time capsule and yanked the power on it, let it be for a couple of seconds and plugged it back in again. Waited until the light turned green, then i started my iMac. It found the disk straight away and now it's backing up.