You are not the first person on here to have a problem like this... If your daughter refuses to divulge the password or is unable to tell you from some other reason then the answer usually given on here is to take it to a specialist repairer with proof of purchace - to show that you have it legitimately - and they will sort you out for a small fee.
Good luck... Hope you get it working soon.
Peccavi
October 2009