Global Keyboard Shortcuts

Hi there,

I have a little problem…
I want to map some buttons globally…
They should be global (instead of live tv), and should take me to home screen, music, videos or pictures…
I tried like this:
<keymap>
<global>
<keyboard>
<o>ActivateWindow(home)</o>
<t>ActivateWindow(favourites)</t>
</keyboard>
</global>
</keymap>

But if i click this keys, there´s nothing… :/

Moreover, i want to map a playlist (music or video) GLOBALLY to a key.
It´s ok with:
<keymap>
<global>
<keyboard>
<n>ActivateWindow(playlist)</n>
</keyboard>
</global>
</keymap>
BUT in this case the key has no function on home screen, in tv window, …
It only ok in music section… :/

Has anyone solutions for this?