Apps Page Not Found dowloading .apk

[simon@dki.ie]

I have created an apk file and hosted it on my server, but when I link to it on an android phone in the browser I get "Page cannot be displayed". The file is in the location I am browsing to, and this works on an iPhone (even though it just downloads and does nothing obviously).

Anyone have any ideas of what I am doing wrong, or things I should check?

I have internet access through WiFi.

TIA.

Simon