ABAP events & oops ALV

Hi

I am working on a report which has a selection screen & 2 ALV display on same page. I am using oops concept.

Problem arises When I am trying to execute report it is directly displaying 2 ALV without data & skips selection screen at all.

My question is what should be the ideal sequence of events to display data properly.

My current sequence is below :

1. Data declarations.

2.Selection Screen

3. start-of-selection

    performs .....to fetch data

     class definition

     class implementation

4.  at selection screen output

        reprid= sy-repid..

        create object dockingtop

        set table for first display..

       create object dockingbottom

       set table for first display...

Below is my overview of what I have done.

Many thanks

Drashti