Keynote will not install on iPad Retina 64. Page and Number install fine.

I had Keynote (Older version) installed and working fine. Update to 2.5.3 was available.

I downloaded the updates. Numbers and Pages updates just file, but Keynote downloads, and just hangs for hours without installing.

I have tried logging out of my iTunes account, restarting, then logging into my account again, but no change. It still will not install.

What is going on?