Trying to run a campaign and its getting stuck at 31%. I have checked the application logs and its full of messages saying General error: 2006 MySQL server has gone away. I have recently upgraded from 1.5.1 to the latest version, other than that there are no changes other than added new subs to lists. I have restarted the server and tried several times to restart the campaign. The server is a dedicated server running at AWS using SMTP2Go as a delivery server. Never had any issues before but i have upgraded. Any idea's ?