Tvheadend

Hi guys. Trying to set up picons but not having much luck.

They populate
The links TVH creates do exist and the icons are correct (of all the ones I tested)
When I click the info button in TVH EPG the icon does not show
Going to the link reports "1 unknown code"

I've uploaded a image to show what I mean.

Any help is apreciated.

Cheers,
Chris