Currently Being ModeratedMay 11, 2012 10:50 AM (in response to 123simon)
123, the first thing to try would be a reset, then a restore of your device...
these things may seem elementary, but they correct most issues
http://support.apple.com/kb/HT1414 ( see the section on restoring..it also suggests backing up and erasing all content and settings first to see if that fixes things)
Hope this helps.