how to get the entry in second list box on selecting value in first listbox

Hi experts,

I am new in HR-ABAP field and i am creating custom infotype. with two listbox.

two list box are :

first list box is

TITLE and fixed values are MR and MIss.

second listbox is

TITLE1 and fixed values are MALE and FEMALE.

I want :

when i will select MR in first listbox so automatically MALE should come in second listbox.

and when i select 'Miss' then FEMALE should come in second list box.

Please solve this issue.