leave to selection screen

Hi all,

I am doing an ALV with oops. I am in screen 0001 now. If I select BACK fcode , it should go to previous screen (in this case selection screen 1000).How can I do this? I have tried with

leave to screen 0.

call screen 0.

But it's not working. It's coming out of that selection screen also.

And I have tried with

call selection-screen 1000.

It's working but, when I select BACK from here, it's going to the ALV screen 0001 again.

Please help.