Can not find control

Apr 15 at 4:42 PM
Hi,

I'm using CUITe fw for automation test, when I create 1 combobox and 1 numericUpDown control without AccessibleName(as the Screen Object sample in fw), I'm try to get control with By.ControlName but can not, whenever CUITe find the first control for click event. please help, thanks!
public WinComboBox combobox
{
    get
    {
        return Find<WinComboBox>(By.ControlName("comboBox1"));
    }
}

public WinComboBox numericUpDown
{
    get
    {
        return Find<WinComboBox>(By.ControlName("numericUpDown1"));
    }
}
And
combobox.Click();
numericUpDown.Click();