How to avoid incorrect calling screen sequence

Hi Techies,

I have got to enhance std transaction where I need to call a custom screen which is defined under different funtion group.

In that screen, I have a command button to cancel the screen, When I use 'Leave screen' it is calling some screen from other

function group. All I need to do is to terminate the screen on clicking

cancel button, I do not need to call next screen of the same froup where new screen defined

I appreciate any inputs on it

Thanks

Sasnthosh