How to Display the data in selection screen in module pool programming

Hi experts,

I am using a selection screen as a sub-screen in second screen of module pool programming.

screen one has create change and display options.

At the time of creation i am ok with the selection screen in second screen.

At the time of Change and Display mode i want to get the data from database and to be displayed in the selection screen. Getting the data from the database is ok but unable to display the data in the selection screen fields. Main problem is when the record is created with the multiple entries in selection screen, i.e,  by using the arrow button in selection screen.  how the data to be displayed for such records.

Thanks in advance.