App doesn´t install on S4 Active and Galaxy Tab 3

[Checki]

I want to install on my Android devices, the Android 1.2 software.

This I refer on your Downloader.

Unfortunately, the installation in the devices will be canceled. The message is "stopped" and will appear once I give the release for unknown sources.

I use a Samsung S4 Active with 4.4.2 and a Samsung Galaxy Tab 3 with 4.2.2.

On both devices the same error and the app can not be installed.

Please help.

[Checki]

Have the problem can be solved.
It is because I am asked during install if I want to install an unknown app, because I've turned off the hook standard under unknown source.
I set the hook before the installation, it runs through fine.