Hi,
You need to upgrade your Quest Web Parts to a newer version. Version 5.6 is available for some time now and 5.7 will be out in April. I you don't want to upgarde to the latest version, since you're on 5.4 I'd suggest you to upgrade to 5.4.1 (please ask Quest Support team for 5.4.1 SP2007 hotfix 163802 which has the fix you're interested in).
Please let me know if you have any questions.