Look at how the example on the tutorial is made up with the full text in the text box element and the button with the show more label underneath it.
Then check your code originally posted in your first post and note the lines with the red keyline around them.
Compare them to the actual code from the tutorial itself and note what it is that is actually put in the code inside the red keylines on here.
If you have not noticed, you have put the button element id name in the full text and short text parts of the code, whereas it should have actually been the text box element id name that you have used.
As you can see in the code from the tutorial, where the red keylines are is where you need to add the id names for the button you have used, as well as the text box element.
