cba key

[coxcom]

hi all,
I developed application in that 3screen switches are there but it can't back to the second screen,directly it come back to the main window.I also send what i written in my program.
void CHellView::HandleCommandL(TInt aCommand)
{

if (aCommand == EHellSwitchToChnlScrView || aCommand ==EAknSoftkeyBack)
{
//iEngine->DoStop();
AppUi()->ActivateLocalViewL(TUid::Uid(EHellChnlScrViewId));
}
else if (aCommand == EHellSwitchToClipScrView)//|| aCommand ==EAknSoftkeyBack)
{
//AppUi()->ActivateLocalViewL(TUid::Uid(EHellMainScrViewId));
//AppUi()->ActivateLocalViewL(TUid::Uid(EHellChnlScrViewId));
//Play Command is selected
DoPlayL();
}
else
{
AppUi()->HandleCommandL(aCommand);
}
}

from this i got error like this
hell.closed
urgent