tabIndex problem

does anyone know how to include components in the tab order. i have some text fields and i’m doing this:

tf1_txt.tabIndex = 1;
tf2_txt.tabIndex = 2;
comboBox.tabIndex = 3;
tf3_txt.tabIndex = 4;

with the above code, i can tab to the component - but then it gets stuck on the component and i can’t tab to tf3_txt. if i comment out the comboBox.tabIndex = 3; line i can correctly tab between the three text fields.

what’s wrong?

comboBox is a flash MX04 component.