[Linphone-developers] about linphone with alsa mode problem

[wool]

hello developers
I install linphone-0.12.2  and install alsa-lib alsa-modules ipkg on ipaq5500 
but when i connect to other ipaq PDA 

it show these message: 

(process:1933): MediaStreamer-WARNING **: alsa_card_write: Error writing 
sound 
buffer (size=512):Broken pipe 

i trace linphone code and find it's error message is from "snd_pcm_writei" 
function 

could someone can tell me how to fix the problem,please? 
-------