I have enjoyed playing Agricola on my iPad for many hours and have bought all of the extra decks for sale. Last night, I tried to use the Remodeling card for the first time and I could not "remove a stable" so that I could change it into an extra wooden room. I had the 1 wood and 1 reed needed to play the Remodeling card and it was highlighted so that I could "use" it but when it said to "remove a stable" all I could do was put a finger on the stable and it wouldn't do anything. I tried dragging it off the board but that did not work. I probably was doing something wrong but I am not sure what to try next.
Can someone tell me how to "remove the stable" in that scenario so that I could replace it with the extra wooden room?