Frm ALV am calling scrn, if click cancel in scrn ALV appear,BACK nt working

Dear All,

I created one ALV Report and provided buttons in tool bar. when user clicks button, which ever line selected in ALV, it has to appear in the new POPUP screen '1100' with table control view.

In Popup screen, If user clicks cancel, ALV page has appeared without refresh.

Now issue - if i click BACK (Standard) in ALV, its going to screen 1100. But it has to go selection screen page.

Note : when executing report, ALV back button is working fine.But once called screen 1100, then came back to ALV again. now back button is not working.

where should i correct.

Please give the solution for this issue.

Regards

leo.