Itunes symbol and usb cord with an arrow showing the usb going up towards the symbol

I don't know what happened. When we moved I lost my Ipod cord so I bought a holder that would play and charge my ipod. Now it is showing an itunes symbol the cd with the blue music note in front of it iTunes written underneath it and a picture of a usb cable with an arrow going towards the iTunes symbol. Does anyone know why this is doing this and how do I fix it. I bought a new usb cord for my Ipod touch and plugged it in to my computer and nothing happend. I have a password on my ipod and I can't get that screen image to show up all that I see is what I explained above. Can anyone help me?