After you create your LFD you have to use the PUBLISH option in Author.
Shortly - it packs your content into one folder, creates the necessary links between them, and allows to upload them as a whole.
After you "publish", go and upload the LFD stored in the folder, which author created.
i.e. if your lfd is saved like Test23.lfd - look in the same place for a folder named Test32. From there - upload the test32.lfd.
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