PyS60

If I play a sound during a call on Symbian 3rd Ed (N95), I get the
following error:

>>> s.play()
Traceback (most recent call last):
File "<console>", line 1, in ?
File "c:\resource\audio.py", line 83, in play
raise SymbianError,(callback_error[0],
SymbianError: [Errno -21] Error playing file: KErrAccessDenied

If I end the call with the keypad, and run the exact same command, it works
fine.

In the documentation (PythonForS60_1_4_3_doc.pdf p.52) it states:
* Calling play while a telephone call is ongoing plays the sound file to
uplink. In some devices the sound le is also played to the device
speaker.

This statement does not seem to be true.