infotype enhancement

hi,

i have enhanced a standard infotype with a field and i have used a feature in it, which checks for molga and returns the molga, if it is a particular country grouping it displays the field otherwise it wont display the field.This one is working,but the thing is when the additional field is not displayed only the frame is visible. i want to get rid of that frame when the field is not displayed.

please help me

thanks in advance