First, read the excellent essay How to Report Bugs Effectively. Then read it again. Really.
If you don't find the answer to your question, then think hard about how to ask.
Post a Question in the SIPfoundry Forum
You need an account on the SIPfoundry infrastructure to post to the forum.
If you include information from logs, it is best not to reformat them or post the prettier versions output by syslogviewer: instead, attach the log segment to your email. This keeps the email programs from line-wrapping or otherwise modifying the log data, which often interferes with tools developers use to examine and display them.
Use the Issue Tracker
If, after discussion on the list, it seems necessary to create an issue in the project tracker, then you can do that.