Navigation between tabstrips when one screen is a selection screen and one normal screen

Hi All,

I have a requirement  where i have  a tabstrip with screen no 'AAA'.. -> This screen is a screen of type Modal dialog box with OK and CANCEL buttons.

In my top include i have defined a Selection screen as a subscreen 'SSS'.

my tab strip contains code as this way

   CALL SUBSCREEN :
           tab1 INCLUDING sy-repid SUB1
           tab2 INCLUDING sy-repid SUB2.

Now in my tabbed screen , TAB1 - > Subscreen 'SUB1' consists of a normal module pool screen with 2 radio buttons.

                                         TAB2 -> Subscreen 'SUb2' consists of a subscreen area where the selection screen 'SSS' is included as

   CALL  SUBSCREEN SUB2 INCLUDING sy-repid 'SSS'.

The modal dialog box opens fine.

Im able to navigate between the tab1 and tab2. Once the control comes to the selection screen , im unable to go back to the TAB1.

Even if i set tabcontrol-activetab for the respective tab, it does not work.

Can you please help on this.

Thanks

Swarna