Can't download to Galaxy tablet from amazon app

[AC Question]

I can download apps, games with no problem until I try to get something from the Amazon app...then it displays this message..this mobile application does not currently support digital downloads. I went back and reinstalled with link from amazon.com and it still didn't work. I have downloaded books to this same Galaxy tablet from amazon.com with no problems. If I didn't have amazon cash I wouldn't bother. Help please!

 

[Laura Knotek]

I'm not sure what version of Android you're running. However, If you want to download/install apps from the Amazon Appstore, you'll need to enable "unknown sources" in settings>security.

 

[Yvette Merriweather]

I'm running 4.4.2 and I have it checked in security -settings. This is driving me nuts!