Unable to download Kodi on my Amazon Fire TV box

Hi,
I have been have problems trying to download Kodi on my Amazon Fire TV box.  I have been following a numbe of how to's sites includng http://www.htpcbeginner.com/install-kodi...n-fire-tv/

I get to the part where you select 'ARM' under andriod and all I can is nothing.

Any ideas please?