[Help] Players Heads are not loading!

Hey Guys
A dev. made a plugin for me with that you can choose a head in a "gui inventory" ... in this inventory are blocks that you can click and then you will get the head. This code explains it better:

meta1.setDisplayName("§7§oGras");
meta1.setOwner("107295"); <--- This is the name of a Minecraft player account!
head1.setItemMeta(meta1);

if (e.getCurrentItem().getType() == Material.GRASS) {
player.getInventory().setHelmet(head1);


I copied it out its worked before 2-3 month I think but now the heads from other users from the minecraft or mojang database or what it is, are not loading and if you choose a head it looks on your head like the normal steve head -.-
pls help me

I tried it on my Localhost but with active internet connection .. is that the problem.. the localhost?

 

It could be that you are on offline mode (if you are), or if the minecraft accounts skins are from blocks, why don't you just put the blocks themselves on the players.