Hi all Has anyone been successful in using PJSIP stack on windows 7? I've downloaded and builded 1.5.5 version (VS 2003). But when I am trying to use pjsua application I've got 14:11:16.057 pjsua_media.c Error opening sound device: Unable to find default audio device (PJMEDIA_EAUD_NODEFDEV) [status=420006] any time the application was trying to use media device. Neither outgoing nor incoming calls were successful. Registration and sip messaging was OK. Any help is much appreciated.