- Making sure a strong WIFI connection is available, so the download can happen smoothly. 3G connection will not work for apps greater than 20mb in size.
- Download it from iTunes on your PC/Mac and then sync the iPad. This is just another way to load your app.
If you still experience this issue, Pl try some of the solutions presented in the Apple Discussion forum link - https://discussions.apple.com/thread/3792214?start=0&tstart=0