Lsaire

Yesterday (february 13th) i bought the TM earthquake and i used it with nidoking. Well i tried. This is the problem: when i use it the menu of my pokemons appears, then i choose nidoking but he doesnt try to learn the move. Only the TM disappears. This happened twice with nidoking. I don't understand. I bought this TM before and i used it perfectly with another pokemon. Pls help me.