by Ken Task.
Suggestions:
1. remove all files/folders in /moodledata/temp/backup/
2. increase max_allowed_packet to 150M (double check to see if there is an 'M' in the setting) and restart the mysqld service.
to check via mysql:
mysql> show variables like 'max_allowed_packet';
output will be in bytes so you'll need to convert to MB's.
http://www.whatsabyte.com/P1/byteconverter.htm
3. Try it again.
a 4th would be encouragement to upgrade the version of Moodle 2.2.11 is quite old and, as I'm sure you know, is no longer supported for fixes (bug nor security).
'spirit of sharing', Ken