According to HP's support site, you should contact Adobe directly:
''Support for Adobe (Macromedia) Flex applications is handled by Adobe. Adobe has released Flex Builder 3.0; this release includes the QuickTest Professional Flex add-in. The add-in was developed using QuickTest Professional's Test Extensibility Architecture functionality. The Flex add-in is developed and owned by Adobe.
Hewlett Packard does not support the Adobe Flex add-in, therefore we strongly suggest contacting Adobe (http://www.adobe.com) to see about availability, support details, and pricing.
Adobe is providing the add-in via an automation package that is shipped with Flex Builder 3 Professional. Basic information on the automation package with QuickTest Professional integration is here:
http://www.adobe.com/support/documentation/en/flex/3/releasenotes_flex3_fb.html
http://www.adobe.com/products/flex/upgrade/
Users can download the automation package with QuickTest Professional integration here: http://www.adobe.com/cfusion/tdrc/index.cfm?product=flex
A specific Adobe license is required and needs to be requested from Adobe. No specific Flex license is required on the QuickTest Professional side.
Note: Support for the Flex add-in is being provided by Adobe. Customers/end-users need to contact the Adobe support organization for help with problems or questions related to the Flex add-in.
Adobe Support and Customer Service: 1-800-833-6687
Software Activation: 1-866-772-3623
TTY: 1-800-685-3573''