Currently Being ModeratedNov 15, 2012 5:54 PM (in response to Sara1827)
Close All Open Apps... Perform a Reset... Try again...
Reset ( No Data will be Lost )
Press and hold the Sleep/Wake button and the Home button at the same time for at least ten seconds, until the Apple logo appears. Release the Buttons.
More Info here > iPhone User Guide (For iOS 6 Software)
Currently Being ModeratedNov 17, 2012 8:36 PM (in response to Sara1827)
Basics from the manual are restart, reset, restore from backup, restore as new. If you've tried ALL of these steps and the problem persists, you'll need to bring your phone to Apple for evaluation.