I'm trying to create an upgrade of an existing GPO that deploys an application. (add another MSI-patch to the existing package)

When I edit the GPO and click the Upgrades tab I do not get any options here like mentioned in various Microsoft books and guides on the Internet.

I have tried with Current Group Policy and A specific GPO but still the same. The window where the package should be is empty.

See screendump

Any one know what I'm doing wrong here?

I'm going to move this to the software forums, as this is both a GPO issue and a packaging issue.