Have no problem receiving mail but intermittent problem trying to send messages.  Some will go through normally and can be found in the "sent" file, while others never get sent and an error message appears telling me that Windows Live Mail quit working.  sometimes it will automatically restart and others it will just freeze.  I have checked all the network settings, removed then re-installed the Windows Live Mail software, tried the Windows Live Mail repair option all with no resolution.    I have even ran the Windows 7 repair disc thinking there might be a problem somewhere with the Internet Explorer interface, but nothing seems to help.  When the problem does occur, the message is lost and never shows up in the "sent" file or anywhere else.  Would appreciate and ideas on what is causing this.