[LAD] problem with alsa/portaudio

Hi all, In one of my code, I use the snd_pcm_open() function of the ALSA lib to access to my sound device, but when I run it I have the following message : ALSA lib pcm.c:2106:(snd_pcm_open_conf) Cannot open shared library /usr/lib/alsa-lib/libasound_module_pcm_pulse.so After having searching on the web, it seems it comes from a conflict between alsa and pulse audio. As indicated on some forums, I have reinstalled pulse audio and libasound2-plugins but it doesn't work, even if the aplay function works well on my system. Does anybody know from where could come the problem ? Thanks in advance Best regards Vincent PS : my distribution of linux is ubuntu 8.10