My daughter forgot her password and now her ipod touch is disabled. When I connect it to itunes it does not come up on the screen as a device. What can I do to get her itouch working again?

My daughter forget her password and now her ipod touch is disabled. Red message says to connect to itunes. When I do connect to itunes, the device is not recognized and then a message comes on the screen that says it is locked and to enter the password to access it. I cannot access the password and since itunes does not recognize the device, it does not come up on the list on the left, i cannot reset it. What do I need to do so she can use her ipod touch again? Thanks