Another guess: do you call the timer functions (expires_from_now(), async_wait() ) from the thread that is running io_service or from another one? That is, who calls ProcessRTPPacket() function? If it's called from another thread, can you try the following:

 

// instead of calling expires_from_now(), async_wait() directly...

yourTimer_.get_io_service().post(boost::bind(&WaveStream::setTimer, this));

//...

 

void setTimer()

{

// Some debug message, to see if the function is called.

...expires_from_now(...);
...async_wait(...); 

}

 

Now see if setTimer is called. If it's not called, you've got some problem with your io_service - it's not running properly.