[Serusers] Sems troubleshooting

Hi, May somebody give me some suggestion how to troubleshoot sems? I need to troubleshhoot sems voicemail, I configured ser (0.9.3) + sems. I'd like use sems voicemail, I configured ser and sems following Configure-Sems-Ser-HOWTO with pasing mail info through fifo_db_url. I'm receiving voicemail announcement about leaving voice message, but e-mail with voice mail is not sent. In syslog I don't see any error, mailq is empty, message wasn't received by postix. I tried also configure mail passing through tw_append, but setting described in manual is probably out of date, because I have some database reading problems with it. Thanks pavol