After doing a clean install, if you log on to TrixBox server web interface and try to view the call logs and you see:
YOU MUST ACCESS THE CDR THROUGH THE ASTERISK MANAGEMENT PORTAL!
Log on to you server using the command line and run the commands below.
service memcached start
chkconfig --add memcahced
chkconfig memcached on
The memcache module is not set to load during system startup. The above commands turns on the service and sets it to load during system startup.