[dnanian]

The TimeCapsule is networked, and doesn't store the data the same way as your 'directly connected' drive. Instead, it stores the data in a 'sparse bundle' with a special name.

What I'd try is to tell Time Machine to back up to the Time Capsule. When it starts, stop it, and it should have created the sparse bundle on the Time Capsule.

Open it, then use SuperDuper! to copy from your Time Machine backup to the sparse bundle's 'image'. It'll take a really long time, most likely, but should work. You can then turn TM back on.