WIN: Screen('WindowToBack') hangs Matlab (R14)

1
I am a new user of PTB, and I searched but did not find anything
reported on "WindoToBack":

In the windows version of PTB, I tried:

window = Screen(0,'OpenWindow');
GetChar; % Do something else
Screen(window,'WindowToBack');
GetChar;
Screen('CloseAll');

After sending the main window to the background, the Matlab command
window hangs and does not respond to the keystroke given to it. I
had to use task manager to shut down matlab entirely.

Does this have something to do with the fact PTB for Win has the bug
Screen rejects a pointer to the Matlab command window"? On the
website (http://psychtoolbox.org/win.html#bugs) it only
says "WindowToFront" would fail if you give it the Matlab command
window pointer...

Or, is my PTB or Matlab not up-to-date?

I use WinXP SP2, PTB 2.54(20 Jan. 2004), and Matlab 7.0.0.19920
(R14).
Thanks in advanced!

Joseph