Back to main screen Issue

Dear All,

My initial screen has 2 radio buttons, on selecting will take to a selection screen with few fields, i have enabled the back button using MODULE user_command AT EXIT-COMMAND.

when i select a Radio Button 1 which takes to the Selection Screen 1, if the user clicks back button it works fine, even thou we got a mandatory field, it goes back,

however when i click Radio Button 2 it still takes me to Selection Screen 1, its the same vice versa.

Is there anyway i can change the screen based on radio button entry