Mate look a few pages in back and you will see my comment with How to make hammers and after Drunlar helped me , do what Drunlar said in the comment and after you edit leave your house go and wait some seconds and exit the game relog and see if it works , yesterday when i restarted it was still 0/5 hammers and today when i entered the game it was 5/5 so gl , try to edit more 0D that you think the hammers might be ,play with the numbers.. it will work , sorry for my english