Ok, have you tried this yet?
Restarting and resetting iPod touch
If something isn’t working right, try restarting iPod touch, forcing an app to close, or resetting iPod touch.
Restart iPod touch: Hold down the Sleep/Wake button until the red slider appears. Slide your finger across the slider to turn off iPod touch. To turn iPod touch back on, hold down the Sleep/Wake button until the Apple logo appears.
If you can’t turn off iPod touch or if the problem continues, you may need to reset iPod touch. A reset should be done only if turning iPod touch off and on doesn’t resolve the problem.
Force an app to close: Hold down the Sleep/Wake button for a few seconds until a red slider appears, then hold down the Home button until the app quits.
You can also remove an app from the recents list to force it to close. See Opening and switching between apps on page 17.
Reset iPod touch: Hold down the Sleep/Wake button and the Home button at the same time for at least ten seconds, until the Apple logo appears.
Let me know how it's going.
Regards, Richard