Can not post message to mail list of team multi-touch-dev

First, I had followed the troubleshooting(https://help.launchpad.net/Teams/MailingLists#troubleshooting) and had made sure:
    1. No, I cannot find my message in the list's archive(https://lists.launchpad.net/multi-touch-dev/), although I'm indeed using Gmail.
    2. Yes, I am sure that the google mail box(<email address hidden>) is regiestered with my this launchpad account.
    3. Yes, I had already joined to that team and subscripted its mail list about a month ago.

Please help me to check it, thanks!