I actually opened up the DLC file and took a look at the links to see the problem.

Error

This file is neither allocated to a Premium Account, or a Collector's Account, and can therefore only be downloaded 10 times.

This limit is reached.

To download this file, the uploader either needs to transfer this file into his/her Collector's Account, or upload the file again. The file can later be moved to a Collector's Account. The uploader just needs to click the delete link of the file to get further information.

So it doesn't look like this will ever be fixed unless he re-uploads the files. >_<