I have a Time Capsule and my Time Machine no longer seems to work on my MBA. It had been working fine for the past 2 months. It would do quick backups (between 1-3 MB normally) after my first long backup. Now whenever I look at my MBA it will show Time Machine spinning but always says "Preparing Backup." It will stay in this state for days. If I try to stop the backup it will then be stuck in "Stopping Backup." The only way to get out of this is to turn off the computer. Then it will say "Last Backup Failed" and the next time it tries to sync the process will start over again. In the past I would have some problems if the MBA went to sleep in the middle of a backup where the backup would fail, but it would work the next time it tried to backup. I don't know why it isn't working anymore. Any advice would be appreciated. Thanks.