Remember last button selected..code problem!

[issanasr13]

Hi,
this code from tutorial example
this code works fine,But in my app not working!
Is there another way to let my app remember the last button selected.

Selection.setFocus(btnWeather);
if (System.capabilities.hasSharedObjects)
{
trace("Has SOs");
SharedObject.addListener("soLastSelection",showLastSelection);
var soLastSelection:SharedObject = SharedObject.getLocal("soLastSelection");
}
else
{
trace("No SO");
Selection.setFocus(btnWeather);
}

function showLastSelection(argSo:SharedObject)
{
trace("argSo.data.selection: " + argSo.data.lastButton);
if (argSo.data.lastButton)
{
trace("YES SO");
Selection.setFocus(argSo.data.lastButton);
}
else
{
trace("NO SO");
Selection.setFocus(btnWeather);
}
}

btnWeather.onRelease = loadScreen;

btnVideo.onRelease = loadScreen;

btnGame.onRelease = loadScreen;

function loadScreen():Void
{
var clipName:String = this._name;
clipName = clipName.substring(3, clipName.length);
trace(clipName);
if (System.capabilities.hasSharedObjects)
{
soLastSelection.data.lastButton = this;
soLastSelection.flush();
}
this._parent._parent.attachMovie(clipName,clipName,0);
}

My app has 4 buttons instead of 3 buttons in this code

[issanasr13]

Ok guys the problem solved

clipName = clipName.substring(3, clipName.length);

The button instance name must be like that(btnVideo)
The first 3 latter will remove so the (Video) screen will appear!