I recently was given a New Ipad for my birthday and have recently tried to download the first 3 volumes of the Vampire Hunter D manga series. Each issue comes in two parts so that is 6 downloads in total. However all the downloads have frozen before completion. They began downloading as normal, then after a while the download percentage counter vanished leaving only the progress bar which soon after vanished as well. Now I am unable to delete them from my Ipad and when I try to view them I just get a black screen. Can anyone help?