Wanted to upgrade my current V7 installation and first of all had to learn that I need to uninstall before being able to install 7.1 - a bit complicated, isn't it? Anyway, while installing 7.1 I get this error message: "The 3CXPhoneSystem Configuration Service failed to install". Then another pop-up says: "There is a problem with this Windows Install Package. A script required for this install to complete could not be run. Contact your support personal or package vendor" What's wrong here? The installer exe I'm using I just downloaded from the 3CX website.