TS1408: iTunes: Finding lost media and downloadsLearn about iTunes: Finding lost media and downloads
Currently Being ModeratedSep 14, 2013 1:36 PM (in response to Maiden3199)
I have an article here that seems to describe your issue and can provide you with some helpful troubleshooting steps to resolve the issue:
If you are still having an issue after attempting to use the information above to resolve the issue, then you may need to report an issue with the download by following the steps in this article:
Take care, and thanks for visiting the Apple Support Communities.