Speex dev - Jun 2006 - echo canceller in win32

Hi all,
   speex is great,echo canceller in speex is great,when I test echo canceller
with testecho.c, it is much better then the echo canceller demo in intel IPP
5.1,but when I use the echo canceller in a real voice chat program for
win32(16khz,20ms,winmm or portaudio or directsound), it is not work. Who can
help me? I will pay money for a demo using dsound with source code.Thanks a lot.
      Best regards.

            Yong Chen
            admin@seeyoucn.com