Can't take off armor (not cursed!)

For some reason I cannot take off my blessed +1 ring mail I started the game with. It just says "You can't take that off". I found a better piece of armor that provides a better AC and is much lighter and I would very much like to equip it. What's causing this?


You may be wearing something over top of that armor that would prevent it from being removed, such as a cloak.