I am writing a game and i use the four picture for the tank as following

tankUp = new QPixmap(":/CannonBattle/Resources/tank up.jpg");
tankDown= new QPixmap(":/CannonBattle/Resources/tank down.jpg");
tankRight =new QPixmap(":/CannonBattle/Resources/tank right.jpg");
tankLeft = new QPixmap(":/CannonBattle/Resources/tank left.jpg");

every thing is fine when i run the app on my deveploment computer, but i send app to my friend, he cannot see the tank picture. i have distributed three dlls "QtNetwork4.dll" "QtGui4.dll" and "QtCore4.dll". need help....