Dual screen and Winamp
 

I have two screens on my PC.
On the second screen at the top there is Winamp.

Maximised with the player view.

So far so good.

But if i click on the button to extend the Winamp to the media library view and so on, Winamp switch to the first screen in maximised mode.

How could i change this behaviour? It should expand the media library also on my second screen.

Why is Winamp switching the screen?