Hi,
I've investigated a little bit more about the problem you reported.
Inside the tar file you sent us there are two different QM releases mixed together, probably as a result of an uncompleted upgrade procedure. This, for sure causes not only the problem you signal here, but more subtle problems that are not easy to understand and find.
I strongly suggest you to have a complete reinstall of QM, deleting the version you have not and installing the 1.5.0 already released.
Please, don't forget to backup the database and your custom configuration files (web.xml and configuration.properties) in order to apply to the new installation the key values you changed for customizing your QM copy.
Let me know what you'll have.
Thank you.
Marco Signorini.