A.Try restarting iPhone. To turn it off, press and hold the Sleep/Wake button until the red slider appears. Slide your finger across the slider to turn off iPhone. To turn iPhone on, press and hold the Sleep/Wake button until the Apple logo appears.

If it doesn't solve issue, please refer to the Troubleshooting Assistant
http://support.apple.com/kb/TS1702?viewlocale=en_US

A.Please send us your questions with "Your name" and "Game title"
mobilesupport@capcom.com

A.Please check Apple's support page;
http://www.apple.com/support/itunes/