I'm at the right location, in the same place I brought the items from. Have tried to equip them both through Inventory menu and using Items button in the same room (this just brings a black page). so why can't I equip them?
You should be able to equip them from the "Items" button on the position page. If they don't show up there, then they are in a different room. Make sure the roomID of the room you are in is the same as the roomID that's visible in your item inventory.
It's possible that your items were moved into containers. Can you check your inventory if they are stored in one of the containers that are in your current room?
If so, you can "open" the containers and take the item(s) out.