Have you tried restarting or resetting your iPod?
Restart iPod: Press and hold the Sleep/Wake button until the red slider appears. Slide your finger across the slider to turn off iPad. To turn iPad back on, press and hold the Sleep/Wake until the Apple logo appears.
Reset iPod: 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. Ignore the "Slide to power off".