Fully custom item, need help getting it working.

[Traggey]

So, I'm creating a custom item for my story. I've got a new model and it's set to be an item which you can pick up. Within the game, the item glows as it should indicating that you can pick it up, and it also shows the hand when aiming at it. However I can not pick it up. I've gotten a suggestion that an icon file is needed. However I can not find any proper information about file formats, locations and image dimensions the logo needs to be. Anyone got some nice info on that for me?