Widget Second Screen

For my widget I am trying to develop a second screen.

I have added a new view using a listener on the enter event:

function onKey(evt) {
if (evt.getKey() == Ui.KEY_ENTER) {
Ui.pushView(new CView(), new CDelegate(), Ui.SLIDE_DOWN);
return true;
}

return false;
}

I then want to enable returning back to the main view:

class CDelegate extends Ui.BehaviorDelegate {
function onBack() {
switchBack();
System.println("BACK");
return true;
}

function onNextPage() {
System.println("NEXT PAGE");
switchBack();
return true;
}

function onPreviousPage() {
System.println("PREVIOUS PAGE");
switchBack();
return true;
}

function switchBack() {
Ui.popView(Ui.SWIPE_DOWN);
}}

This works fine on the simulator. However when testing on my watch when returning from the second view the watch displays the normal watch face for a few seconds and then goes back to the main page of my widget. However the functionality is strange. For example it doesn't really respond to more keys except after a long delay. It's as almost as if the event is being captured first by the watch and then by the widget and something goes wrong. A similar thing happens with up or down. It momentarily returns to the main page of the widget and then goes to the next real widget - again as if the watch has captured the event.

When I look at the CIQ_LOG.txt log I get the following message:

TVM ERROR:
Circular Dependency Error
Unfreed memory on exit

I know that something like this must be possible because the widgets such as the Weather or barometer widget use the "enter" key and return functionality.

What I am doing wrong?