hi, thanks to all who gave me response. i tried both answers. i have added the code whatever you told and i made some changes pjsua_acc_id pjAccId = -1; pjsua_acc_config acc_cfg; pjsua_acc_config_default(&acc_cfg); acc_cfg.id = pj_str("sip:"SIP_USER"@"SIP_DOMAIN); if (strlen(SIP_USER) > 0) { acc_cfg.cred_count = 1; acc_cfg.cred_info[0].scheme = pj_str("Digest"); acc_cfg.cred_info[0].realm = pj_str("*"); acc_cfg.cred_info[0].username = pj_str(SIP_USER); acc_cfg.cred_info[0].data_type = 0; acc_cfg.cred_info[0].data = pj_str(auth_password); } if (outbound_proxy != NULL) { acc_cfg.proxy[0] = pj_str(outbound_proxy); acc_cfg.proxy_cnt = 1; } status = pjsua_acc_add(&cfg, PJ_TRUE, &acc_id); if (status != PJ_SUCCESS) { pjsua_perror(THIS_FILE, "ERR adding new account", status); } it is giving me error "ERR adding new account". can you tell me what is the reason and one more thing how i have to give in output for execute this .... Regards New_bie -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20081202/28f2a1e9/attachment-0001.html>