Playing wave file ends immediately (C++, Windows) | I have got the following situation. On a machine there is a **Fritz ISDN** card. There is a process that is responsible for playing a certain wave file on this device's wave out (**ISDN** connection is made at startup and made persistent). The scenario is easy, whenever needed the process calls `waveOutWrite()` on the previously opened wave device (everything initialized without any problems of course) and a callback function waits for `MM_WOM_DONE` msg to know that the playback has been finished. 


Since a few days however (nothing changed neither in the process nor the machine) the `MM_WOM_DONE` message has been coming immediately after calling `waveOutWrite()` even though the wave lasts a couple of seconds. Again no error is reported, it looks like the file was played but had zero length (which is not the case). I am also sure that `waveOutReset()` was not called by my process (it would also trigger sending the mentioned message). I have already used to have some strange problems in the past that where solved simply by reinstalling **TAPI** drivers. This time for some reason it is problematic for me to perform that once again and I am trying more analytical approach :). Any suggestions what might cause such a behavior? Maybe something on the other end of the **ISDN** line?