Backup feature generates "Internal Error" in OM 3.0.5

Dear all, With OM 3.0.5 , clicking on "System Backup" in Administration Panel generates a blank page with "Internal Error" When i try the same feature as root with command line "./admin.sh -b -file backup_today.zip", i get the following message ... 2770 openmeetings INFO [main] openjpa.R

Managing OM and Apache both on port 80

Dear all, I'm trying to change OM 3.0.5 tcp port from 5080 to 80 and get http error 403 (You do not have permission to access this document.) when trying http://domainname/openmeetings What is already done: 1/ http.port=80 in red5.properties 2/ 80 in config.xml 3/ restart apache & red5 4/