cannot play .wav using mpegpes

Hi,

I can play using the normal sound adapter, but I would
prefer to send it over my Hauppauge Nexus-S. Does not work yet:

mplayer -v -ao mpegpes /usr/share/sounds/pop.wav

generates:
...
==========================================================================
Opening audio decoder: [pcm] Uncompressed PCM audio decoder
dec_audio: Allocating 2048 + 65536 = 67584 bytes for output buffer.
AUDIO: 44100 Hz, 1 ch, 16 bit (0x10), ratio: 88200->88200 (705.6 kbit)
Selected audio codec: [pcm] afm:pcm (Uncompressed PCM)
==========================================================================
Checking audio filter chain for 44100Hz/1ch/16bit -> 44100Hz/2ch/16bit...
[libaf] Adding filter dummy
[dummy] Was reinitialized, rate=44100Hz, nch = 1, format = 0x00000001 and bps = 2
AF_pre: af format: 2 bps, 1 ch, 44100 hz, little endian signed int
AF_pre: 44100Hz 1ch Signed 16-bit (Little-Endian)
Could not open/initialize audio device -> no sound.


Version info:

MPlayer 1.0pre3-3.3.3 (C) 2000-2003 MPlayer Team

CPU: Intel Pentium 4/Xeon/Celeron Northwood 2003 MHz (Family: 8, Stepping: 9)
Detected cache-line size is 64 bytes
CPUflags:  MMX: 1 MMX2: 1 3DNow: 0 3DNow2: 0 SSE: 1 SSE2: 1
Compiled for Debian.


-- 
Wolfgang