Missing publication on Fire Tablet

Hi.   I can see "The Economist" when I log on to Press Reader on my Windows PC or on my Android phone, but when I log on via my Amazon Fire Tablet, it doesnt aappear in the category "Business" or in "News" (or anywhere else).   I access Press Reader via my library account (Hampshire) and "the Economist" is definitely available - just not on the Amazon Fire Tablet.   This is really strange, because in theory, it's a version of Android.    Any ideas ?