App Manager 7.3 won't start

When I run startApplicationsManager.sh, it says it cannot connect to MySQL:

./bin/mysqladmin: connect to server at 'localhost' failed
error: 'Can't connect to local MySQL server through socket '/opt/AdventNet/ME/AppManager7/working/mysql/mysql.sock' (2)'
Check that mysqld is running and that the socket: '/opt/AdventNet/ME/AppManager7/working/mysql/mysql.sock' exists!

If I run the working/bin/startMySQL.sh script, then run startApplicationsManager.sh, the only output is "070912 13:35:07 mysqld ended". The script exits with code 0, but applications manager does not get started.

Whether mysql was started manually before running startApplicationsManager.sh or not, StartUpLogs_err0.txt ends with:

Wed Sep 12 11:18:15 EDT 2007 : Mysql daemon is not running on your Linux machine.Please start the daemon and retry
Wed Sep 12 11:18:15 EDT 2007 : Unable to create database Exiting Web NMS

and then app manager shuts mysql down.

Mysql is present, and can be started manually using the working/bin/startMySQL.sh script. When it is started, mysql creates the working/mysql/mysql.sock file.

Applications Manager was working after first being installed. It is version 7.3, and the license file is valid.

What can I do to make App Manager start?