Hello i had the same problem and i tried this and it worked! Frist double tap on you home button fast and a little bar should come up with all the apps you have used! now hold down on the skype app so keep your finger on the skype app that in the little bar at the bottom. after you have held it down u will see a little red line or minus line at the top left of each app press that little red arrow and the app should dissapear from the little bar below (dont worry you haven't deleted the app from your ipod the just press the home button one and go back onto the sype app and Log in and it should work!!!