image - Rails image_tag doesn't show -

image - Rails image_tag doesn't show -

i have next image tag in view:

<%= image_tag "http://cdn2.sponsorpay.com/app_icons/26600/big_mobile_icon.png" %>

when go url straight image visible, embedded site, doesn't show.

any ideas why happens?

edit: must have link. as

<img src="http://img3.wikia.nocookie.net/__cb20131004141939/clashofclans/de/images/6/62/barbar.png">

works, while:

<img src="http://cdn2.sponsorpay.com/app_icons/26600/big_mobile_icon.png">

doesn't work.

i tried adding <img> tag link page using chrome's console , received err_blocked_by_client message. seems service hosting image has disallowed other domains requesting it.

ruby-on-rails image ruby-on-rails-4