Animated Guardian how to use?

I'm trying to use the animated guardian gem.

I place an item on the ground, hit the button, nothing happens.
The spell is using mana but no guardian.

The items need to be identified and make sure you hover over the item names. Then it should work.

If the item lvl is to high for the gem it won’t work, and the items you use will stay on the guard even if you have to spwn him again if you log out and back in you will have to spwn and because the game crashes you will have to summon him again and again but items will be the same, only way you have to use new items is when it if he dies, also good info is if you use items that have buffs to allies you and your other minions get the buffs like from king makers axe and some boots that gives you and pets speed and chest that gives him size and buff your other pets, also look for helms that give buffs also, or a good helm with lots of hp and maybe reflect damage always a good pick, you gonna need good support gems so before you put lots of good items on your guard make sure you use minion life gem and also something that gives him Fortify so he won’t die, if your minion build is good and you gear him will he can end up with almost 80k life and only some bosses will even come close to killing him, good luck!!