No Sound recordind with LifeView TV Walker Ultra

[Guacho]

I'm new user of GB-PVR.
I have a LifeView TV Walker Ultra.
I can watch LIVE TV ok, the problem is when I record.
The image is ok, but I hve no sound.

This is the error when I try to play with media player clasic:

Stream 1
AVI Splitter
ACM Wrapper

Media Type 0:
--------------------------
AM_MEDIA_TYPE:
majortype: MEDIATYPE_Audio {73647561-0000-0010-8000-00AA00389B71}
subtype: MEDIASUBTYPE_PCM {00000001-0000-0010-8000-00AA00389B71}
formattype: FORMAT_WaveFormatEx {05589F81-C356-11CE-BF01-00AA0055595A}
bFixedSizeSamples: 1
bTemporalCompression: 0
lSampleSize: 4
cbFormat: 18

WAVEFORMATEX:
wFormatTag: 0x0001
nChannels: 2
nSamplesPerSec: 32000
nAvgBytesPerSec: 128000
nBlockAlign: 4
wBitsPerSample: 0

In GSPOT the audio codec tell me:

PCM Audio MPEG-1 Layer 2

When I try to render have the following error:

Failed to connect to Output Pin 0x00a493ec ("Stream 01&quot on AVI Splitter to Input Pin 0x00a29cfc ("Audio Input pin (rendered)&quot on filter 0x019a79a0 ("Default Direct Sound Device&quot, ConnectDirect() failed. Error 0x8004025c: Cannot playback the audio stream: the audio format is not supported.

Anyone knows how to fix this.

I love to get this working so I could rec without watching the picture, and get only 10% of cpu load at 720x576 Pal divx capture.
If I do it in Live TV the load get up to 75% of cpu.

Thanks.

Guacho.