I used Qt for symbian 4.7 to create a comboBox by Qt designer. In Windows platform, it could be shown normally. But when I run it on the real device, after pressing the button of comboBox, the drop-down list was shown at the lower half of the screen, it was divided with the comboBox.

Does anybody know how to make the drop-down list showing as a part of comboBox(normally, it should be displayed close to the main component of comboBox)?